A guy is going on a tour of a factory that produces
various latex products. At the first stop, he is 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 the 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 "Hiss. Hiss.
Hiss. Hiss-pop" noise. "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 condoms!"
"Yeah, but it's great for the baby-bottle nipple business!"