...I can do it on purpose too I used to do it as a kid after baths by sticking my naked butt in the air, relaxing and... I don't know how to explain the motion, it sort of feels like my vag is gulping in air

Oh god, there go my chances of ever being respected on here anymore
Totally get what you mean tenibear lol. Hilarious thread, sorry, but it is. Nice to know you aren't alone lol.