"Harmonica" joke

A newly married sailor was informed by the navy that
he was going to be stationed a long way from home
on a remote island in the Pacific for a year. A few
weeks after he got there he began to miss his new
wife, so he wrote her a letter.
"My love," he wrote "we are going to be apart for a
very long time. Already I'm starting to miss you and
there's really not much to do here in the evenings.
Besides that we're constantly surrounded by young
attractive native girls. Do you think if I had
a hobby of some kind I would not tempted? "
So his wife sent him back a harmonica saying, "why
don't you learn to play this?"
Eventually his tour of duty came to an end and he
rushed back to his wife. "Darling" he said, "I
can't wait to make passionate love with you!"
She kissed him and said, "First let's see you
play that harmonica."