Suck and Blow
4 or More
The more players for this game the better. Best to sit boy girl, boy girl in a circle. Someone starts and puts a card against their lips and sucks in to keep it there. While doing this that player has to pass the card to the player on their left placing it against their mouth. So the player receiving the card has to suck it so it stays against their mouth.
The card gets passed player to player doing this, not using their hands at any time. If the card is dropped the two players involved have to both take a drink. If the same player messes up more than three times they have to take a shot.
If the card is dropped between the same two people more than four times there is clearly too much tension between the two and they must kiss. If the card makes it all the way around the circle of players, the person who started gets to make a rule.