I had to "learn" how to enjoy sex on LSD
and other psychedelics, but
once I did, boy is it great. I completely agree with the poster who
said it's like the entire process is one long orgasm.
I have a theory that part of it has to do with the bladder and the
prostate, which as everyone knows is the male g-spot. Psychedelics tend
to suppress the urge to urinate, and thus your bladder can be very full
without feeling uncomfortable. The full bladder presses against the
g-spot and voila, you've got a 15 minute orgasm.