gushiggins: So this begs my question, something that I have not (yet) experienced:
Of course erections are natural during sleep; the last normal count I heard was 5-8 per good night's slumber. However, if the sleeping man's erection (and only the erection) is then acted upon by an awakened and careful gf (or bf, of course), does this rouse the sleeping man? There is the aptly named wet dream, but usually the sleeping man does is awakened by the ejaculation, not the arousal.
Anyone have their REM erection acted upon by someone else? If so, did it wake you up?
-Z