Also known as HTP. When you bring a bunch of gay boys (usually newly out of the closet) together to spend the weekend with each other, what inevitably ensues is that everyone hooks up with each other over the course of the weekend, ensuring that if anyone suffers from Herpes, they'll be transmitting it to everyone else in the group who engaged in hooking up.
Guy 1: Hey, why don't you come over this weekend? John, Mike, Hunter and Lance will be there. You know, we'll be "hanging out."
Guy 2: Thanks for the Herpes Transmission Party invitation, but I'd like to remain disease free for now...besides, I'm not into all those guys.