hunchback bartender

A guy walks into a bar where there's a hunchback bartender and orders a shot of rye.The bartender serves it and says,that's six dollars.The guy pays and says give me a beer.Guy pays and the bartender says ,that's four dollars.Guy pays and starts to walk out and the bartender says,say fella,your the first guy all week that never once mentioned my hunchback.The guy says,oh,is that what that is?I thought it was your butt,because everything else is so high in here.