People have already pointed it out, but Dex is unnecessary now. Accuracy is almost entirely level based, and Luk actually adds more avoid than Dex. ...
That's just the pleasure of holding in your business for too long, and as a gamer I have that feeling if I decide to hold it in just so I can kill a boss or get a level or go to the next map before stopping off at the bathroom, even if I'm at home.