http://www.i-std.com/
It pays to take a few minutes and check out the above site, so many STD's, 75% of sexually active adults have HPV (warts and shit, why Valtrex makes billions)
BTW jerking off does not mean sexually active :-)
Its important to learn a bit about STD's etc. it will make you think twice where you put it and the importance of condoms
As far as adult stars it amazes me a guy like ron jermey does not have a world of STD's but you never know, the guy sticks his toung in a girls asshole i mean come on