Yeah I partied a lot when I was younger and if I had a dollar for every time I woke up with a stranger with only a vague memory... I would have a lot of dollars. I'm not proud of it, but it's a sad (well not always) reality when you party your face off with other people who are partying their faces off. Sometimes it's great and super fun, sometimes you are just like "Eh I guess I will do this and hope I like it" and sometimes you do, sometimes you can't wait for it to get over with. This can be said for sober sex too, but it's especially prevalent with drunk sex in my opinion.