He sniggered. He didn’t like to think of himself as the sort of person who giggled or sniggered, but he had to admit that he had been giggling and sniggering almost continuously for well over half an hour now.
“His first theory was that if human beings didn’t keep exercising their lips, their mouths probably shriveled up.
After a few months of observation he had come up with a second theory, which was this--“If human beings don’t keep exercising their lips, their brains start working.”
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