This Irish guy goes into a bar in the Greek Islands. Sinead, an Irish student who is currently working behind the bar, takes his order and notices his Irish accent. Over the course of the night, they talk quite a bit. At the end of the night, he asks her to sleep with him. Although she fancies him, she says no. He then offers to pay her 100 quid for the deed. Sinead is travelling the world, and because she is strapped for cash, she agrees.
The next night, the same guy turns up, and after showing her plenty of attention throughout the night, he asks her to sleep with him again for 100 quid. She figures "in for a penny - in for a pound," and as it was fantastic the night before, she goes home with him again.
This goes on for 5 nights. On the sixth night the guy comes into the bar, but this night he just orders a beer and sits in the corner. Sinead is disappointed, and figures that maybe she should pay him more attention.
She goes over and sits beside him. She asks him where he's from, and he says, "Cork." "Wow," she says, "Me too! - what part?" "Montenotte," he says. "Jesus, that's amazing," she says, "Which street?" To which he names the street. She is truly gobsmacked. "This is uncanny," she says, "what number?" "Number 20." "You are not going to believe this," she says, "I'm from number 22! My parents still live there!" "I know", he says. "Your Da gave my five hundred quid to give you!"