Pleasure: The lips are populated with a variety of nerve endings that give pleasure as they are stimulated. It helps a newborn figure out how to feed when they have never been hungry; helps the toddler get through a rough day with thumb sucking; makes us enjoy kissing & smoking & chewing your nails. If it weren't for society frowning on the process, more would probably do it.
Answered 8/9/2012
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