If he can recall his high school golden years, memorize rosters of football teams, remember combo sequences for video games, read volumes of philosophy, build elaborate stuff (action figures, a house, car, etc), figure out how to get a promotion, invest to buy a big ticket item, diligently attend weekly hunting trips, poker nights or game nights with the guys and bring food/beer...

Then he should be able to make you cum! He just doesn't want to learn.