They're not "butt cheeks," they're "sugar cookies."
In a conversation with one of my daughters, a few years ago, when they were both still in elementary:

Me: those shorts are too short, unroll them. (In my defense, booty cheeks were showing – we call them “sugar cookies”.)
Her: but then they have this ugly fringe.
Me: fringe looks cute. Denim cut-offs are in style (not really knowing if this is true).
Her: I don't want to wear them that way.
Me: well, then, you need to find other shorts, because that's too much leg.