A fellow is going on tour of a factory that produces various latex products. At the first stop, he's shown the machine that manufactures baby-bottle nipples. The machine makes a loud Hiss-Pop! noise. "The hiss is the rubber being injected into the mold," explains the guide. "The popping sound is a needle poking a hole in the end of the nipple." Later, the tour reaches the part of the factory where condoms are manufactured. The machine makes a noise: Hiss, Hiss, Hiss, Hiss-Pop! "Wait a minute!" says the man taking the tour. "I understand what the hiss, hiss is, but what's that pop every so often?" "Oh, it's just the same as in the baby-bottle nipple machine," says the guide. "It pokes a hole in every fourth condom." "Well, that can't be good for the condom!" the man states. "Yeah, but it's great for the baby-bottle nipple business!"