I got some of these from a board game from Spencers:
-fake an orgasm till everyone else is satified
-talk about the subject of sex without using the word "sex", if they fail, they must remove an item of clothing (note: watches, jewlry, chains, etc. are accessories, not clothing items)
-whenver someone doen't accomplish a dare right or refuses to do it they must remove an item of clothing. Once they're out of clothes they must do something like role down a hill or run up the street or something before putting their clothes back on.
-dip a tampon in juice or soda or something and suck the fluid out of it.