Yeah, it is getting to be more and more excepted, but most men will not talk about it openly! It is where our G-Spot is and shouldn't be anything wrong with doing that! Now, you may be right about him taking care of himself while you were at work. One thing to concider, if he is having trouble cumming, try using anal stimulation on him with you two are having sex. I know if I have trouble cumming, my wife can always get me to cum this way! It makes it pretty intense, too!! Just have an open mind when you bring this idea to him, if you do. Best of luck on this!