Gentlemen and Honour

From a Reason discussion:

A simple, unsophisticated guy, much like myself, is invited to a formal dinner. During the course of the dinner, the hostess breaks wind loudly. Immediately, the gentleman sitting to the left stands up and says "Excuse me". A little later, the hostess breaks wind again. Immediately, the gentleman sitting to the right stands up and says "Excuse me". This piques the unsophisticasted guy's curiosity. He asks the guy next to him, "Why did those two guys apologize for farting when everyone knows our hostess did it?" His neighbor says, "It's the gentlemanly thing to do, to save the lady from embarassment." A little bit later, the hostess breaks wind again. The unsophisticated guy immediately jumps up and says, "Sit down guys, this one's on me."