cold dipping
When a group of guys see who can hold his genitals in a glass of ice water the longest.
Girl #1: Where are the boys?
Girl #2: Oh God. They went into the kitchen for a round of cold dipping; Lex claims he's the world champion or something.
Girl #2: Oh God. They went into the kitchen for a round of cold dipping; Lex claims he's the world champion or something.