Lol, sometimes, usually isn't a problem though, really depends on the girl more than anything, depends on her body type. Thigh gap and not being railed by niggers are your best bet for telling if a girl's gonna be tight. Probly some other things but I'm stoned.
Fuck, one time I fucked a girl who had 2 kids via C section before she was 19, lol and I couldn't fuck her missionary with my hand on her hips because I kept feeling this weird indent from where they opened her up in the same place, lol it was grosssssss man tripped me right out but it was cool. Ya, slutty fucking girls have loose pussies but if the girls tight before chances are her pussy won't be wrecked afterwards. I don't think I've ever fucked the same girl before + after pregnancy so I can't give it my 100% seal of approval based on a study trial but have def fucked tight girls who've had kids not via C