I would have to say the best sex I have ever had would be the first time I had sex on E. We fucked for a solid 6 hours. Like in each other non stop for atleast 2-3 of it. Just grinding and she rode me non stop. It took so much work for me to cum that first time but when I did I almost passed out. I mean I came like a woman, I had to grab the doorway to keep from collapsing, My knees shook, I had to sit down for liek 20 minutes before I could stand again. What made it even better is this girl was like my best friend so there was never any romantic tension. We loved to hang out and fuck whenever we feel like it but it created a really free and relaxed environment for sex. Like she knew how I loved to get deeper and deeper and at one point she said "dude, you can't get any deeper. You've run out of vagina. " lmfao! Come to think of it I have a ton of videos and pictures from this night. I may need to post some later. Anyways what are your best experiences with substances?