A recent sexual encouter with someone of unknown status involved no penetration of any type, but did result with my hands coming in contact with a large amount of semen. Earlier that day I had sustained a small cut on my hand, which had scabbed over and was not bleeding at the time of the sexual encounter -- and none afterwards. There was, however, some rubbing that I'm afraid could have helped the virus enter my bloodstream. I did wash my hands within several minutes of the encounter. I've never engaged in anything other than safe sex in the past and am worried that this one seemengly low risk activity could have put me at a significant risk. How worried should I be? Am I an appropriate candidate for taking anti HIV drugs ASAP?