I think this might be easier for women to do than men, as women are more readily connected to the psychic realm. It takes a special man who has the discipline to focus his sexual/psychic energy enough to project it.
I have done it, and it has been awesome. :) I have only felt it back form three men, and they have all been heavy duty meditators.
Even when one of them was just thinking about me, I would feel it as a tingling (hair raising on arms etc) that moved up my body as a wave.
I remember reading Robert Monroe's book Far Journeys out of the body. He described endusing out of body experiences (through sound waves) for a couple, who then made love in the out of body state, when their physical forms "slept. in the lab.
I would definitely love to meet a man with enough psychic power and spitiual discipline to try the kama sutra in the etheric realm. :)