That manstuff link was somewhat interesting, although their ratio of masturbation ejaculation to "other" ejaculation was something like 2:7. I\'d think it would be more like 50-50, but I dunno, I\'m not a man.
I know that I personally, am annoyed by nipple erections, if you could call them that. I don\'t have to aroused or cold, it just happens. It\'s embarrassing, and I hate it.