The rationale and logic behind flexing:
1. The joy of witnessing my own growth and progression
Some people like to track their stocks, their financials, and other metrics. To me I like the qualitative measure of seeing my body before my very eyes evolve, grow, augment, become more.
Also what I love about tracking my own bodily growth:
I can actually control it.
2. It is a fun game
Some people like to play video games. I like to play my body game! The game:
How strong can I physically become?
And truth be told, I care more for my strength gains [powerlifting] more so than my physique. My belief is that it is more empirical to grow and measure your ‘one rep max’ versus the subjectivity of your personal bodily physique.