If Mario Batali was really involved in tip-skimming, then he's a bum. I enjoy waiting on the occasional guest I allow into my house, but to have to make a living from such work is not an appetizing prospect. So I always tip properly when I am out. For some reason, pretty girls bring out my avuncular and paternal and generous side. You have just spent an hour giving this old man a massage and listening to his persiflage? Then you deserve a $10 tip, $20 at Christmas.
Here are my maxims on tipping.