Hm, the best sex I ever had... Well, that's a hard pick. It would have to by any time my bf went from oral sex and then climbed up my body to place himself inside me; I was always so wet and ready it just slid in perfectly lol. Especially if he got into it and we went fast and he moaned and everything else heheheh.
Aside from that, the sexual experience that affected me the most afterwards would have to be my first time. A, it was goood, B, it didn't hurt. The day after I was in the car with friends and the experience just rushed back into my brain and body and I got so aroused and wet just sitting there thinking about it lol, I almost orgasmed. I think I turned 5 shades of red too XD