This is an interesting thread.
Personally I have an issue with dream sex, where I lose control and just go after sex. I'm still lucid but I just can't seem to help myself. I will run off and try to find a woman, or create a woman, or morph an old lady into a much more attractive woman. In the majority of cases I wake up before I get very far.
I've had 2 dreams where I successfully reached a dream orgasm (not in real life), one woke me up and the other caused me to have a very embarrassing false awakening (woke up on the floor of my bosses office, naked in the throes of orgasm, with my boss looking on in horror).
I had one LD where I ended up waist deep in mud and discovered it felt good when I was thrusting, so I just kept going which resulted in a dream orgasm and another false awakening, this time in a classroom full of student at my old high school. One young woman yelled out "WHAT ARE YOU SOME KIND OF PERVERT!!!" I ran out of the room and woke up.
I had once LD where I walked by a mirror only to notice I had a shockingly enormous penis, then I did what I believe most men would do...I began to perform fellatio on myself. I just couldn't reach orgasm before I woke up.
I've posted most of my dreams on this forum, but I left out the more sexually graphic ones.
I have also found that a kiss can be almost as orgasmic as sex.
I would love to try a few interesting things. I would like to see what it would be like to experience sex as a woman with a woman who has a penis. That could be interesting. But I have to get back into LDing enough to get some practice in staying a dream for a long time.
"All that we see or seem is but a dream within a dream." ~ Edgar Allan Poe