"blondes" joke

Once upon a time there was a prince and a princess. One day the
prince had to leave town on a business trip and he was scared to
leave his wife alone because she was very pretty and a lot of
people wanted to have sex with her. So before he left he put a
blade in her pussy so if someone did it with her, their dick would
have a cut on it.
So when he came back from the business trip and he told all his
servants to pull down their pants. All the servants had cuts on
their dick, but except for one. So the prince asked the servant
"everyone wants to do it with my wife why didn't you have sex with her?"
The servant didn't reply. But he just stuck out his tongue.
And on his tongue there was a big cut.