RE @39: A raging erection wouldn't accomplish the same, with less clean-up?
Doubtless. But if there is one thing we should know after 25 years of Savage Love it is that what is especially "arousing" and what isn't is very often completely irrational.
I remember (from the time before the internet) an advertisement in the "personals" section of a newspaper from a guy seeking another guy. The most important quality mentioned for applicants was that he should have "creases on the back of his leather jacket". Everyhing else was secondary.