I've always wondered what the deal was with Darth Vader's "crotch door". Does he use a catheter (due to all his injuries) or does he simply flip the door up and whip it out? I've never really seen the the back of his suit under his cape to see if there a corresponding "back door".
It doesn't look like he carries a catheter bag nor a colostomy bag in his suit or anything.
Is this addressed anywhere either in canon or legends sources?