6LETTERS

Don't Guess, Measure.

by Senior's Know-How | May 18, 2026

Why Do We Try to Classify People So Easily?

These days, 

the internet is overflowing with terms that divide people into two categories.

    “Teto male.” 

    “Egen male.” 

    “Teto female.” 

    “Egen female.”

At first, I thought it was just a meme. 

But as I kept watching, 

people seemed strangely serious about it.

     “Isn’t he totally the Teto male style?”

     “Egen males are definitely kind.” 

     “If testosterone is high, do people act like that?”

At some point, we started explaining people’s personalities, speech patterns, dating styles, 

and even fashion using the single word: hormones.

But then I suddenly wondered.

Can humans really be divided that simply?

 

Hormones Are Much More Complex Than You Think

People often call testosterone the “male hormone.”

That is true. 

But at the same time, it is an extremely incomplete expression.

Testosterone is not simply a substance that creates aggressiveness or masculinity. 

            Muscle recovery

            Focus / Concentration

            Motivation

            Competitiveness

            Confidence

            Libido

            Sleep

            Mood

            Stress response

It is even a very important hormone for women as well.

The problem is that people consume hormones too easily, like fictional character traits.

As if:   

        “High testosterone = Alpha male” 

        “Low testosterone = Emotional / Sensitive”

 Like this.

However, actual human physiology is not that simple.

Even the Same Person Changes Every Day

What’s even more interesting is that hormones are not fixed values.

Testosterone changes significantly even within a single day.

Days you sleep well vs. days you don't sleep well are different; 

right after exercise vs. in a state of overwork are different; 

and even during stress situations vs. when falling in love, the body moves differently.

According to research, male hormones can vary by more than 20–30% between morning and evening.

So in a sense, 

    the morning version of me could be a “Teto male,” 

    and the night version of me could be an “Egen male.”

It sounds a bit funny, but actual physiology is much more fluid than you think.

 

 

 

Why Do We Want to Classify People So Much?

Perhaps humans are naturally beings who want to understand others quickly.

The popularity of MBTI probably came from a similar reason.

When you summarize a complex person into four letters, your mind feels at ease.

   “Ah, that person is like that because they're an ENTJ.”

   “That person has that style because they're a Teto male.”

It becomes easy to explain.

However, at the same time, it is dangerous.

     People change depending on the situation, 

     change with age, 

     and change depending on relationships.

Hormones are the same.

Hormones Are Closer to a 'Condition' Than an 'Identity'

Rather than personality, I view hormones as a concept closer to “condition.”

   If you don't sleep, you become sensitive;

   if you receive long-term stress, your motivation drops; 

   and if you exercise consistently, your vitality rises.

This isn't a change in personality, but a change in the body's state.

Yet we often mistake that temporary state for a person's essence.

In fact, humans are beings that fluctuate much more than we think.

And within that fluctuation, hormones move continuously.

So What's More Interesting Is 'Change' Rather Than 'Classification'

 

 

Because a person is not a fixed character, but a living biological system.

       Some days you are full of confidence, 

       some days you are anxious, 

       and some days you feel helpless for no reason at all.

Behind that change, sleep, stress, relationships, exercise, recovery, and hormones are intertwined.

Maybe what matters is not a game of guessing who is a Teto male, but understanding what state my body is currently in.

In the End, Humans Are Much More Multi-Dimensional

The internet keeps trying to divide people into two.

       Strong people and weak people. 

       Alpha and Beta. 

       Teto males and Egen males.

However, real human beings keep fluctuating somewhere in between.

And perhaps that is what makes us human.

I think the technology to understand that fluctuation will become even more important in the future.

Not to label someone, but to better understand ourselves.

Because hormones may not be a brand that defines a person, 

   but rather a biosignal that reflects our current state.