I know a guy that claims you have to poop after sex or you'll get pregnant. Since guys don't have vaginas does that mean they have to poop the baby out their dick? What even is the difference between a vagina and butthole aren't they basically the same thing?

I hope this isn't true because I'm a 30+ year old virgin which means I can't poop after sex because I never have sex. How am I supposed to avoid getting pregnant if I can't have sex so I can poop after doing it?