Simple really...
Open up a copy of WrestleMania 21, pop it in your X-Box and have a play.
Amuse yourself and the missus with the superb 'Bra and Panty' mode where the aim of the game is not to knockout your opponent but whip their clothes off until they're in their undies...
Then try a single player match and get trounced as your character is weak as hell... So try a two player match, with your nine year old daughter gagging to give you a virtual kicking...
Writhe around on the canvas as she pummels the hell out of you in a frantic random button punching frenzy... somehow get up and then do the same to her to have her burst into tears as she doesn't like being beaten up and not be able to get up....
Put game back on shelf, turn off X-Box and make a mental note to NEVER play a youngster at any sort of fighting game again...