>>76756487
What can we say? You bulk up, get muscular and bigger, and you want a bigger version of femininity to go along with it.
A masculine man is more masculine than a skinny one. A thick, plump woman is more feminine than a thin, skinny one.
The contrast between overt, visual masculine and feminine shapes is what's hot.
And also when they have more padding you can really let loose and use your strength. When you're a big guy, you gotta treat the small, petite chicks with kiddy gloves if you don't want to take them to snap city.