You shouldn't kick someone in the nuts.
Ace is playing football and is approaching the player on the other team with the ball.
Ace wants to take down the player.
Ace dives at the player and tackles him.
Ace runs up to the player and kicks the person in the nuts.
The player is downed and Ace's team gets another chance to get the ball.
The referee calls a foul and Ace's team loses yardage.