I'll send you a text <a href="http://pretty-woman-luzern.ch/item/gesicht/">cheap medication</a>  Economists like myself have long wondered why patrons tip at all, particularly when they eat in a place they do not intend to visit again. The obvious answer is that tipping is such a strong social norm that stiffing a server is generally considered to be the equivalent of stealing (thus, it’s not really a voluntary payment).