I hate those boxers with the gaping fly. Aaargh! And brand isn't the determiner because I'll have some of one brand that stay closed just fine and others that don't. I've decided to always buy the ones with a button fly to keep the peekaboo penis play down. Although if I really have to pee and the button is buttoned, sometimes it's a pain. Seems like they could figure that one out and make them ALL no gap fly doesn't it?!