A Costly Lunch

Three passersby had lunch at an inn and set off on their way. "Say, lads, didn't we pay too much for lunch?" "Well, I may have paid a lot," said one, "but it wasn't for nothing!" "What do you mean?" "Didn't you notice? Every time the innkeeper looked away, I'd grab a handful of salt from the salt cellar and pop it in my mouth, pop it in my mouth!"