Almost every university lecturer possesses a distinct teaching style, and for Professor Chang, "going off-topic" was a signature method. Not only that, but every student and faculty member at the medical university knew that this professor not only enjoyed veering off course, but particularly favored straying toward the three inches below the navel, which is why they cynically nicknamed him "Professor Intestine." The "Professor Intestine Quotations" were a perennial classic on the university's campus BBS, even spawning a massive fan base.

Whenever he proclaimed some outrageous opinion or delivered a stroke of genius, students would instantly record it and update his collection of sayings. And so it was: seeing him about to launch into another "tangential remark," the students immediately perked up, eagerly awaiting his next pronouncement.

In a back corner of the lecture hall, Geng Bin murmured to Wang Zhuo, "I bet what he's about to say is mostly about you." Wang Zhuo managed a wry smile and a slight nod—Old Chang loved improvising on hot topics, and Wang Zhuo himself was the hottest topic of all, right up Old Chang's alley! As expected, Old Chang leisurely took a sip of his tea, then smiled and asked, "Have you all seen the pictures of Wang Zhuo and that female celebrity?" The classroom immediately erupted in noise—laughter, affirmative shouts, and teasing cries rose and fell.

Some students yelled that they had seen them, others claimed the pictures were crystal clear and thoroughly enjoyable, while some of the girls remained shyly silent, though their suppressed smiles clearly indicated they, too, had viewed them. Geng Bin lowered his head, chuckling silently, his shoulders shaking uncontrollably.

Wang Zhuo could only rub his forehead in resignation; his prediction was spot on—Old Chang was going to bring up the photos of him and Irene again. Old Chang raised both hands slightly, quieting the students before adopting a serious tone: "What I want to discuss today are some insights I've gained from my studies in physiognomy." A mischievous male student immediately called out from below the lectern, "Professor Chang, why not discuss Wang Zhuo's physiognomy instead?" "Who says I'm not discussing Wang Zhuo?" Old Chang chuckled, waving his hand dismissively as if shooing away an annoying fly, and continued addressing the class: "Wang Zhuo isn't here today, is he?

Good, we can secretly discuss him without him knowing." More laughter followed. Professor Chang smiled and continued, "He used to come to my classes often; he was a good student.

But he seemed less interested in the main subject and more in listening to my nonsense. You all enjoy my nonsense too, right?" Another wave of laughter swept through the room.

Seeing that the atmosphere was sufficiently charged, Professor Chang feigned caution: "We'll drift where the conversation takes us. Don't spread this around later, especially don't tell Wang Zhuo." This time the laughter was uproarious.

Wang Zhuo was both amused and exasperated—Old Chang was truly a master of wit today; he could rival Guo Degang! "As you all know, human skin is composed of three layers: the epidermis, the dermis, and the subcutaneous tissue.

Fingerprints are the raised lines on the epidermis, possessing uniqueness, heritability, and constancy." Old Chang began his lecture, speaking with utmost seriousness: "Because the complexity of fingerprints provides sufficient features for identification, we can consider fingerprints to be absolutely unique." Everyone listened intently. This was Professor Chang's brilliance: if he taught stuffily, sticking strictly to the textbook, he would only put the students to sleep, unable to absorb anything.

By using this method of learning through amusement and interaction, he subtly infused knowledge, making the students feel refreshed and ensuring they remembered the key points. "Actually, identifying a person involves more than just fingerprints and palm prints," Professor Chang said, extending his right hand and showing his five curled fingers.

"Take a look—none of our fingernails are perfectly smooth; they all have incredibly fine vertical striations. By examining these vertical ridges on the nail, we can also determine identity for the purpose of solving crimes or other matters." Instantly, more than half the students in the hall lowered their heads to examine their own nails.

Wang Zhuo nodded slightly with interest. He had seen related segments on television about these things; he knew a little.

"Lip prints are the same," Professor Chang stated after everyone had looked, smiling. "Even identical twins, who look the most alike among humans, have distinct differences in these morphological features.

If any female students here ever find lipstick traces on your future husband's collar, take it to a private investigator for analysis, and you'll uncover the third party." The students began whispering among themselves—why was Old Chang suddenly getting so serious? Although this knowledge was novel and interesting, it wasn't his usual style.

Professor Chang tapped the desk and continued, "Also, I wonder if you've noticed... the venous patterns on the back of everyone's hand are also different." "We know that," a female student immediately raised her hand and laughed.

"We learned in anatomy class that while the general venous patterns in the human body are similar, there are individual variations, just like differences in height or build." "Correct," Professor Chang pointed happily at her. "It’s the same principle as finding two identical leaves in nature.

Therefore, in the Edison Chen photo scandal of '08, someone knowledgeable in this field confirmed that the pictures weren't faked by comparing the venous patterns on a certain female celebrity's hand." Wang Zhuo's lips curled upward slightly—Old Chang really couldn't hold his liquor! He had only been serious for less than three minutes before descending into his usual tricks!

A light murmur swept through the students, anticipating Old Chang’s next words. "So," Professor Chang smiled meaningfully, "we can now extrapolate.

Do you all understand now? In truth, every man's 'two-five-zero' is unique.

They possess individual variations, whether small or large—even the venous patterns upon them differ, making it a man's second face." Before the words fully landed, the students' expressions became rich and fascinating. "Understood, Professor!" a male student suddenly exclaimed, raising his hand.

"Are you telling us we can use this method for autopsy?" The student next to him immediately muttered under his breath, "Autopsy your sister! Can you try to think normally for once?" Some girls also giggled quietly to their companions, "So that means...

we've seen Director Wang's second face, haven't we? Hee hee..." Others chimed in with their own opinions: "If you talk about the fame of the second face, I think Wang Zhuo is definitely number one in the world." "Alright, I admit I'm not as handsome as Wang Zhuo, whether it's the face on top or the face below." "What is Old Chang trying to say?

I don't get it, there's no theme." "He's saying you haven't met enough men, beautiful." Wang Zhuo, seated in the back row, smiled wryly. Although Professor Chang was using him as material again, his discourse was certainly up his alley.

The research he was currently engaged in was precisely about helping men improve their second face—that was far more powerful than Botox injections, nose bridges, or double eyelid surgery! "This 'second face' also aligns with an old saying of ours: 'Appearance reflects the heart,'" Professor Chang finally hit the nail on the head.

"This perfectly matches my long-held view: precious resources for all humanity like Wang Zhuo should produce more offspring to elevate the quality of humanity as a whole. Therefore, from his photos, we can see that he himself has a strong urge in this regard." Professor Chang's statement stunned everyone again.

Laughter, stamping feet, overturned tables and chairs erupted simultaneously, and one fellow even banged his forehead onto the desk with a loud thud! Old Chang ignored the students' various reactions and continued on his own path: "By reading facial features, we can understand a person, but by looking at the physiognomy of the second face, we can understand that person more comprehensively." "This is a principle I have recently researched, but unfortunately, the conditions for widespread promotion are not yet met, haha." "Let's stick to the topic!

Since everyone has seen those pictures, you should all have a deep impression, right? So I will analyze them, and you all tell me if I am right!" "..." Professor Chang spoke eloquently at the podium; the students below either listened with rapt attention, whispered amongst themselves, or enthusiastically debated with the professor.

The atmosphere in the classroom was unprecedentedly lively. Wang Zhuo listened, caught between laughter and tears.

Old Chang's analysis had a bit of sophistry to it, but whether it was based on genuine evidence or utter fabrication, no one could say. For instance, saying he had a strong urge to procreate and was therefore unconstrained by relevant regulations seemed plausible, but claiming that the angles of the photos revealed his burgeoning desire to conquer the world was too far-fetched—was it?

He just let a foreign woman service him orally; how could Old Chang analyze world domination from that? In the hall, among nearly forty students, there were those who regularly attended Professor Chang's lectures, and newcomers like Rong Xueha and Dai Shan, who were trying him out for the first time.

Although they had been warned about Professor Chang's tendency toward inflammatory remarks, hearing him firsthand revealed that the reality far exceeded their expectations. Four girls sat huddled in a corner of the classroom, whispering and occasionally laughing softly.

Male gazes occasionally drifted in their direction. The campus's number one beauty was attending Professor Chang's class, listening to Old Chang critique Director Wang's second face—it looked like the campus forum was going to have new fodder for discussion today.

Geng Bin whispered to Wang Zhuo, "This old guy can really spin a yarn. Boss, do you think he's right?" Wang Zhuo smiled wryly.

How was he supposed to answer that question? Should he tell Geng Bin that Old Chang was right, that his own desires were indeed stronger than ordinary people's, and that he was quite adept at handling women?

That sort of thing wasn't easy to say out loud! As he was figuring out how to answer Geng Bin, Sister Rong happened to turn her head at that moment to adjust her long hair.

When her gaze fell upon Geng Bin, she paused in surprise, then quickly scanned him up and down—her eyes immediately flashed with astonishment!