No, really:

These e-cards appear funny, sexy and hip, but if you're lucky, you won't be seeing one in your inbox anytime soon.

They're the newest way for gay men diagnosed with a sexually transmitted disease to tell their sex partners about their condition.
...
[Internet Sexuality Information Services, A local San Francisco health advocacy group] devised six pithy slogans, including: "It's not what you brought to the party, it's what you left with," "You're too hot to be out of action" and "I got screwed while screwing; you might have, too."

And you thought a "Dear John" letter was bad.