I agree totally with PineMan. I believe the best you have to do is to have a straight and honest discussion with him about this and I am sure the result will be the best for both of you.
Hey- some options 1. yes , conform to his schedule. When out rub one off 2. Shower is fine , not during rush hours 3. find a lonely bathroom in one of the class buildings or library and hook it there. 4. ask him if he gets the urge and how does he handle it, be frank- shit we all do it.
It wasn't easy - as my roommate and I were on mostly the same schedule and classes, but we had a few different things now and then - I just had to be strategic about it. He had a strawberry blonde girlfriend with nice tits....so sometimes he'd drive home for the weekend and I had the place to myself. Doing it in the same room, at night in the dark with dorm bunk beds was a very rare occurrence, he was kind of a macho guy and I didn't want to risk getting shit from him about doing it, so it was only for an emergency....and if I had a handy tube sock...likely he was sneaking it in, too...but nobody talked of such things... In the hall showers, no way. There was too much traffic and too much funny business of getting the curtain flung open or someone stealing off with your shorts or towel. Luckily, the next semester, we both happened to land single rooms, so that problem got solved.
My freshman roomie and I were pretty incompatible on this point. I had grown up a shameless whackaholic with the freedom to masturbate as much as (and wherever) I wanted, and suddenly I had to consider a closed-minded roommate. What a pain. Out of necessity, I got very creative in finding places to satiate my need to masturbate to orgasm. I had some crazy close calls and some amazing moments (including a few with like-minded students).