"Problem at the Nudist Colony" joke

John is in Amsterdam and visits a nudist colony there.
While wandering around naked he sopts a gorgeous blonde and he immediately gets an erection. The woman notices his erection, comes over and says "Sir, did you call for me?"
John replies: "No!"
She says "Well, it's a rule here that if I give you an erection, it means you called for me."
She then layes him down and starts making love to him.
Later that day John visits the sauna, but as he sits down he farts. A huge big hairy guy get up, drops his towel to show a huge erection and says "Sir, did you call for me?"
John replies, "No!"
The man says, "It's a rule that when you fart, it implies you called for me." The man then knocks John to the floor and has his way with him.
As soon as he's finished John rushes back to his room, grabs all his things and heads for the exit. On his way out he's stopped by the manager he askes "Can I help you? "
John says "Here's my room keys I'm leaving early"
The manager asks why and John replies "I'm 60 years old, I get an erection once a week but I fart 20 times a day! !"