Here's a joke:

Jef works at the zoo in Antwerp and takes care of the chimpanzees. The zoo has a very rare female "Flatbottom Chimpanzee" called Buurip in it's collection and it's the pride of their zoo.

The problem is that Buurip is the only of it's type left over in the whole world! The zoo director desperately wants Buurip to mate with another chimpanzee, so at least after Buurip dies they'll have another rare animal even though it's not a pedigree "Flatbottom Chimpanzee". They tried to mate Buurip with at least 20 different (male) chimpanzees and none were interested. Buurip was blessed with a wonderful caracter but was pretty ugly.

Then the zoo director had an idea: would Jef like to mate with Burrip? He takes care of her every day (except Sundays) and it's their only chance.

The zoo director was a bit embarressed when explaining his idea to Jef, but Jef didn't seem too put out. The zoo director wanted to reward Jef should he agree to his plan: "Mating with Buurip is worth 50,000 Bfrs", the director told Jef. To the relief of the director, Jef didn't immediately refuse the offer, "I'll have to discuss this with my wife first and I'll get back to you about this tomorrow", Jef told the director.

The next day, Jef entered the director's office. "I'll agree to your plan, but only on three conditions", said Jef. The director was relieved, but wondered what those three conditions were.

"First, I want Buurip to be disinfected and cleaned", said Jef.

"Second, I want the cage to be hidden from the public". The director could live with these demands, but what is his third demand thought the director?

"Third, can I pay the 50.000 Bfrs in three installments?

GET IT??