When you play football, but every guy has to be naked with throbbing boners, and to score a touchdown your boner must enter the endzone before any other part of your body.
ref: That is a foul, you're leg entered the endzone before you're boner did
Player: Total boner kill, Boner football sucks, lets just insert eachother's boners in our butts.
Player 2: I love Boners in my butt
Player 3: Hey guys, we came here to play boner football