Masturbate every night and be sure to make a lot of noise, the first few times he'll catch you and be thoroughly disgusted, but he can't rightly punish you unless you had research or something. Just use your imagination, he likely won't punish you for it because he'd rather not even acknowledge it happened. Then, when you can make a whole lot of noise pleasuring yourself and he refuses to open the door from fear of being outright disgusted again, you can begin to stay up late and play on your compy and masturbate to what's posted in the MLP:FiM thread.