Ok.
So this guy has been with his girlfriend for a while, and while on vacation in jamaica, and slightly intoxicated, they decide that to show their love for each other, they are both going to get tattoos of the others name. So they guy goes in to the tattoo parlor, and tells the tattoo guy that he wants "Wendy" tattooed on his dick. The tattoo guy is like "okay, but you need to get it hard so I can do this." So he hands the guy a porn mag, and things progress, and he gets his tattoo. He goes home, shows Wendy, and things are fine. Well, he notices that when it is limp, he can only see the letters WEY. This kind of disturbs him at first, but he gets over it. Well later that day, he goes in to a bathroom to take a leak, and he is standing at the urinal and looks over to see this black guy with WEY on his dick too. He is like "I know this is ackward, but is your girlfriends name wendy too." The jamaican looks at him, then looks down and says "No, it says 'Welcome to Jamaica mon, have a nice day."
Disclaimer: This joke is way better told, especially if you do the jamaican accent right.