Analyzing from behind...

Last evening while we were getting ready to go to skating, I was walking in our porch to get Madden's sneakers. He stopped me, all of a sudden:

Mom! Mom! Stop! 

What Madden?

How come when you walk your butt cheeks go all like this? [and he proceeded to walk with a deliberate arse wiggle from side to side]

Ugh. Little arse himself.