Kick him in the nuts. When they accuse you of doing that say “Impossible, if he is a girl, how can he have nuts?”
you win for best reply
Never admit to a battery. Better the girls should do as you say, but then tell investigators that the “girl” with nuts was standing on a chair or bench and waving the nads at passing females. The confused child slipped and fell onto the place it was standing, injuring the sensitive area itself.