The art of manliness:
Why Manliness?
I think ever since I was a kid, I always drove to become more manly, or masculine, more dominant, etc. Why?
First and foremost, I remember when I was a fat kid, and being teased, and wanting to do something about it. Thus my early impetus is a kid, I remember having a triple chin when I was around 1112 years old, and I was motivated to make a change.  I asked my mom to buy me some dumbbells, I started lifting weights, first starting with 15 pound dumbbells, double stacking them to make them 30 pound dumbbells, and then I think I later got a 50 pound dumbbell. Lots of bicep curls and shoulder presses.
Also, a funny memory that my friend Spencer always reminds me, when I started to put rocks in my backpack and go on long runs.
Media?
Certainly another big one is the media. As a kid growing up, the media I was exposed to was mostly video games, and comic book hero stuff. For example while I never read any comic books, I was really into the video game adaptations of Spider-Man, wolverine, Iron Man etc. And what do all of these superheroes share? Their superhero strength and muscles.  I still remember vividly as a kid, when I withdraw my own superheroes I would always draw them with really cut, and lean and large muscles. 
Also, when you draw a superhero, they always have a six pack.