I have found 2C-E to have a delightfully erotic side to it. It's not totally evident at first maybe, but the wife and I have definitely had some really good sexy times whilst tripping on 2C-E.
I felt like 2C-T-7 could top 2C-E for erotic potential, but alas my partner didn't want to engage in carnal activities every time I've sampled 2C-T-7.
5-meo-mipt takes the cake for the psychedelic which I've had the most amazing sex on. It was just soooooooooooooooooooo good feeling and I was able to last forever. Once I did achieve orgasm it was totally phenomenal, and both I and my partner remarked on the entactogenic qualities of moxy contributing greatly to the pleasure of the whole episode.
However, we tried to repeat our sexual adventure the next day by each taking the same dose of moxy as we did the night before, and the wife got diarrhea. So, take that for what you will.....maybe it was just her body's way of saying "gimme a break !!"
LSD is actually super duper duper good for having sex on, I would have to say it is tied with 5-meo-mipt. Infact, i would say it's even a little better, due to less peripheral side effects associated with LSD. But in terms of sheer intensity of pleasure, 5-meo-mipt was mind blowing.