For every couple who play this game you will need two small cups and one straw. Put six M&Ms (or Smarties) in one of the cups. Place the cup with M&Ms at the feet of the man and ask him to hold the empty cup between his legs.
On the word go the girls must all kneel in front of their partner and race to suck all the M&Ms out of one cup into the other, using just the straw.