Tipping at the Strip Club

So, me and my girls went to an All Male strip club last night.
A stripper came over and flexed his buttcheeks for us. One of the girls wanted to impress us, so she pulls out a $10 bill, licked it and put it on his butt cheek. Not to be outdone, another friend pulls out a $20 bill, licked it as well and put it on his other butt check. Still attempting to impress the rest of us, my other friend pulls out a $50 bill, also licks it and again puts it on one of his butt cheeks. Now the attention is focused on me. What could I do to top that? I got out my wallet, thought for a minute… and then got out my ATM card, swiped it down the crack of his ass, grabbed the $80 bucks and went home! 😎