my dad is really flexible. he could bend his hands back. i am too. i was more flexible as a child. i've gotten stiff lol.
but i still can get my hands on the floor knees straight, not my palms though anymore. my mom was all omg how did you do that? lol. it wasn't that weird. and i can get my hands to touch behind my back, mom can't, i think. i think it's genetic, if you're flexo or not.