"Broken Rubber" joke

Sven & Ole, a couple of Norwegians now living in Minnesota, head for the fair in Duluth. The first thing to catch Sven's eye is the big double Ferris wheel.
"Oh, Ole," he says, "vould you look at dat. I've always vanted to go on von of dose big Ferris veels. Let's go ride on dat von."
Ole, not being near as adventurous as Sven says, "Oh, I don't tink so. Dat looks kind of dangerous to me." "Vell," says Sven, "you give me yust von good reason vhy you von't go vit me on dat ride."
Ole couldn't come up with a good reason so up they went. Ole had to admit after the ride that it was kind of fun.
After another 10 or 15 minutes they came to the roller coaster. "Oh Ole," says Sven, "Vould you look at dat. Dat's von fine looking roller coaster. I tink ve should go for a ride' on dat."
"Oh, I don't tink so." says Ole. "Dat looks very dangerous to me."
"Vell," says Sven. "You give me yust von good reason vhy you von't go vit me on dat roller coaster."
Again Ole couldn't come up with a good reason so they both went up on the roller coaster. Ole had to admit after the ride that it wasn't so bad.
After another 10 minutes or so, they came to the bungee jump. "Oofdah!" exclaimed Sven. "Vill you yust look at dat, Ole. Dose people yump off dat big tower vit nuttink but a rubber band tied to dare ankles. Dat looks like so much fun. Come on, let's go do it."
"Oh, I don't tink so," says Ole. "Dat's much too dangerous. Dis is vare I draw da line." "Vell," says Sven, "you give me yust von good reason vhy you von't go up on dat tower and yump off vit me."
"Ya, I give you a good reason," says Ole. "I came into dis vorld because of a broken rubber and, by jimminy, I'm not going to leave it da same vay."