During a party, player characters are asked to write five dares down, each on a slip of paper, to be randomly drawn from a hat. Since this tends to take some time to come up with good ones, they may want to come up with some in advance. When directed, players privately message their dare list to the GM. Players and characters can cooperate making dares, but remember the dares will be randomly selected (The GM will jumble them and then inform players which their character got during game play) and a character might just get the one his/her player wrote!
“The game is only as perverted as the players” –Ketsurui Hanako