Hi Mattmatt.....
What do u think washing hands after pee pee is a big or small issue? Though it is considered to be a not -so -hygenic problem,yet I think he was just not taught in doing do while being a kid, and even though he is still living healthily,so he is unable to keep it as an habit. The relationship between the two won't need too much reasoning, but sweetness and understanding. Argues in small issues gather together would becoming a big one. Remember men are from the Mars, it would be difficult for the women to understand them...be tolerant!