At least this one had some kind of sex in it. I honestly don't understand the expansion fetish. Don't mind seeing ladies with some muscles getting pounded, but just what is so erotic about seeing muscles grow?
@cdog21 As someone who prefers expansion/growth WITHOUT the sex, It has to do with the concept of newfound power, of untapped potential, and the rushing feeling of that coming into a body. It's one of the pure fetishes--it doesn't have to include sex to be a turn-on, and in fact, sex can ruin it by taking the focus off of the growth. That impossible feeling of power rushing in as more of you is being created is incredible by itself.