…you know, like in old-timey underwear… If you had that butt flap, would you use it to poop OR would you still feel more comfortable pulling your pants all the way down to poop?  See, I never use the wiener-hole in my underwear to pee, I just pull the elastic down to assure plenty of clearance.  I think I like the idea of a butt flap, but pretty sure I’d still pull my pants all the down.