In a similar vein....
Guy goes to the toilet and as he's standing there he looks over at the tackle of the guy next to him. What he sees just makes him too curious and he says "excuse me but why do you have Wy tattooed on your dick?". "Oh", says the guy unperturbed, "when I get an erection it spells my girlfriend 's name, Wendy". They both leave, curiosity satisfied.
A week or so later the guy is in a loo again standing next to a large Caribbean man. "excuse me but is your girlfriend called Wendy?" he asks. "No why?" says the man. "well why do you have Wy tattooed on your dick then?". "ah", says the man, "when I get an erection it says Welcome to the West Indies, have a nice day"