More backstory, with a bit more action (I wanted to get you guys to the goods):
http://relationshipgoalsxxx.com/sticking-my-dick-in-crazy/
Earlier in the day, I'd broken up with my girlfriend. This wasn't uncommon, as the relationship had been faltering for months. When I came home, my roommate convinced me to tag along to the beach with he and his girlfriend. I used the "third wheel" argument and they invited a "friend for me."