I'm sitting in this low-life bar drinking beer, and the guy sitting next to me starts pointing out the various hookers in the place. He's describing them to me in great detail; the guy obviously had "been" with all of them, at one time or another. He knew too many details - things like tattoos on that one's upper inner thigh, the mole next to the left nipple on the other one...
Anyhow, I'm enjoying my beer and this guy's ongoing commentary. I saw a new girl come into the bar, obviously another hooker the way she dressed and acted. So I ask the guy with all the info, what does he know about her?
He says, "Her? She could suck-start a leaf blower."
I nearly fell off my barstool I was laughing so hard.