Hi there..I have been “leaving my body” for many years now and many times I’ve encountered sexual episodes however most of the time I would ” create” these myself out of pure desire for them..and they usually came on after a vivid lucid dream of sex. Honestly I think it triggers OBE’s because it is connected to our senses and of course our physical bodies. I deliberately create these scenes to sharpen my awareness. I don’t think many of the participants were “real”. However I have had a feeling of hands caressing my body in the hypnagogic state. So I think we encounter many sensations in this state that are supposed to help our “exiting” or gaming awareness process. This is only my theory because in the hypna states we are still attached to our physical bodies and also our subconscious seeps through quite often bringing images,sensations etc, because its very difficult to fully control the subconscious, it creates many things that just seem “real”. I can only speak of my own experience of course and this is what I realized over the years:-) hope to at least give more insight into your question. One more thing, I had to pretty much fight through my subconscious attachments to have more clarity and superb awareness in these states..and I think it is safe to say a lot of the things even people were creations of my subconscious mind. It took years to get through some of it even the darker things locked in my sub and the sexual aspect would show up often.