Girlfriend and I got drunk and ended up giving my roommate a show [MFM]

So here is a story from my first semester of college. At the time I was staying in a dorm townhouse where there were 12 people to a house with 2 people per room and a shared common space. One nice thing was that my roommate was actually a friend from high school named Kevin who was 6’2”, super skinny, pale, and a bit awkward. In comparison, I was a bit taller than him at 6’4” and much more muscular due to all the swimming I did. In all, we got along pretty well and shared a bunch of common interests but he was pretty sheltered and reserved which meant parties were always a weird thing for him.