Celebrity Herpes Lawsuit Sex Tapes

TMZ broke the story ... an unnamed plaintiff has sued "an A-list celebrity of substantial fame internationally," claiming the celeb came on to the plaintiff in Las Vegas and swore he was STD free. The suit claims the celeb actually had herpes, and the pair engaged in "mutual oral copulation, mutual self-gratification, rubbing and massaging each other, play-wrestling, licking and (unprotected) intercourse." The plaintiff -- who is unnamed and unidentified as either a man or woman -- claims the celeb transmitted the herpes virus and wants more than $20 mil in damages.