I always wondered why:

Me: you're getting to smart for your own good
Alyssa: Yep and it all won't fit in my head so its going to my booty that's why my pants won't fit
Me: Ok whatever you say (while hysterically laughing)

And now I know why everytime I turn around her pants don't fit!  And all this time I was wondering if the washer/dryer was shrinking them!