Haha, yeah! We used to send each other to hump/spank the ugliest person in the store in the hopes that they would get caught. It's always a treat when they do. If the customer is pissed off and yells at them, it's hilarious, but it's even funnier when they take it as a cue to ask them out xD. One poor girl was terrible at it, so she was asked out pretty much every shift.
We always used to rush for the friendliest looking customer. A great customer can just make your day if you're on the tills for hours.