477GRMO-079 Observing humans, stretching where skin touches skin turns into foreplay, and before you know it, they're fucking friends with benefits

A man and a woman who seem to be friends. The man is a trainer, and the woman has invited him home to teach her stretching. Apparently, they have already had sex once in a drunken state, and their friendship is already broken. It's only natural that two people like them would get aroused when engaging in physical contact in a confined space. Before you know it, hands reach for the crotch, and the solution to lack of exercise is taken care of through sex.