A newlywed sailor is informed by the navy that he?s going to be stationed a long way from home on a remote island in the South Pacific for 2 years. A few weeks after he gets there he really starts to miss his new wife, so he writes her a letter.

My darling, he writes, it looks like we?re going to be apart for a very long time. Already I?m starting to miss you and we?re constantly surrounded by young, attractive native girls. The temptation?s terrible. I need some kind of hobby to keep my mind off them.

His wife sends him back a harmonica with a note reading, Why don?t you learn to play this?

Eventually his tour of duty comes to an end and he rushes back to his wife. Darling he says, I can?t wait to get you into bed so that we can make passionate love!

But she stops him with a wave of her hand. First, let?s see how well you play that harmonica.