Joe visits Amsterdam fro the first time and decides to visit the red light district. There is only one problem: he only has 5 Dutch guilders, since he wasn't able to change. So, he goes up to a house of pleasure and asks the gate-keeper, "What can I do for 5 guilders?"
The man at the door frowns and says, "Well sir, just walk down the corridor and take the last door left."
So Joe does. He opens the door and there stands a female ostrich. Since you can't be too choosy for 5 guilders he does his thing.

Next day Joe has changed money and decides to visit the same house of pleasure again. He asks the gate-keeper, "What can I do for 10 guilders?"
The man at the door says, "Well, just climb the stairs, go down the corridor and take the last door to the left."
So Joe does. He opens the door and comes into a room where many man are kneeling on the floor, looking to small peep-holes. Joe asks, "Let me also have look."
Through the hole in the floor he sees two beautiful couples having wild sex, and he yells, "Wow, look at that, incredible!"
"Well that's nothing," says the guy next to him. "Yesterday there was a fool doing it with an ostrich."