That reminds me of the time the girl was looking at the sharks circling their boat, and she asked, "If I fell in there, would they eat me whole?"
To which her boyfriend replied, "No - they'd leave that bit."
I don't get the joke.
quote ^
There may be an accent thing going on here.
And it's really a verbal joke rather than a written joke.
In the UK, the not-so-well-spoken lot, (Southern England), say "me" for "my".
So we can assume that the boyfriend is from Southern England, because when our lovely lady friend asked the simple and pertinent question, (in the circumstances), of "Would they eat me whole?" (meaning, "Would those nasty big sharky things eat me all up, every ickle bit of me?"), the uncouth boyfriend thought she was asking, "Would they eat my hole?"
Hence, his response, (which he probably thought was mildly amusing on a different level altogether), of, "No - they'd leave that bit, LDO."
This kind of verbal joke is known as a "pun", and it would be met with hearty guffaws of laughter when told every Friday night in the local pub.