A fellow is going on tour of a factory that produces various latex products.

At the first stop, hes 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 whats that pop every so often?

Oh, its just the same as in the baby-bottle nipple machine, says the guide. It pokes a hole in every fourth condom.

Well, that cant be good for the condom! the man states.

Yeah, but its great for the baby-bottle nipple business!