When I was in high school and college I pretty much masturbated every time I got an erection (which was constantly) because I make alot of pre-cum and if I had an erection for five minutes I'd have a wet spot on my pants. In college, I was very open with my roommates about this and most of them were pretty cool with it. As a result, my dorm room became 'masturbation central'. One of my roommates admitted that he also jacked off constantly and it was not uncommon for both of us to sit at our desks studying and just whip our our dicks and masturbate right in front of each other. One of our neighbors also joined us regularly because his roommate thought jacking off was gross.
We experemented with lots of things, including mutual masturbation and using eachother's spooge for a lube, which is perhaps the hottest thing you can do with someone else! My friend from down the hall and I also used to give each other head sometimes, which I'll admit really turned me on. I still love to give head and swallow. Thinking back on it, it was a pretty hot scene and I still think about it sometimes when I masturbate.