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 mould," 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.
"Very true, but it's great for the baby-bottle nipple business!"