I dunno on the contortion front. Looking outside comicdom and back through history, we have a pretty thorough litany of mating displays by both genders of our species. Most sports glorify the human form, and most of the Classical sports of Western fame celebrated the male form first. Men have been known to wear codpieces, calf-pads to augment their apparent masculinity (see the expression "put one's best foot forward"), sculpted breastplates, and so forth. Certainly bulging muscles have been seen as an overt signal of suitability as a mate (protector, food provider, etc.), and comics have their legions of muscle-bound male heroes... and muscle-bound females, like She-Hulk.