Got a cracking head-ache? my eight year old mimicked?
Smack-heads have the best ones, he belted out the lyrics.

Crack head, smack head, whacking crack, smack head
Smoke the dope and your head will crack a crack crack.

Is yours like that?, he questioned, sounding thrilled.
Like boom, boom, bang, he cheerfully trilled.

Where did such knowledge come from?
They were taught it in "Social Skills"!