This is the real reason I suspect. I worked in restaurants for 8 years as a cook. One place I worked had an admittedly attractive 19 year old waitress on staff. Lines formed in front of her to give her a tip. All these 40+ year old drunks (it was a dive bar) lined up to speak with her for a few moments than hand her a few dollars. She didn't even provide them with anything, they just seemed to revel in the idea that they get to hand this woman a few dollars. Very odd.