Christian Bale Tells Ben Affleck "To Make Sure You Can Take Your Own Piss In The Batman Suit"
"Don't let someone else hold your happy fella while taking a wee... you make sure that suit let's you pop your cock any old-time you need to piss" or something not at all like that, though I'm pretty sure Bale is basically saying someone had to hold his junk while he peed or at least bring it out and put it away for him.