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by FlaviaMichael
June 4th, 2016, 3:12 am
Forum: Are you addicted?
Topic: Thumb Sucking
Replies: 11
Views: 4915

Re: Thumb Sucking

Thumb sucking is a behavior found in humans, chimpanzees, captive ring-tailed lemurs, and other primates. It usually involves placing the thumb into the mouth and rhythmically repeating sucking contact for a prolonged duration. It can also be accomplished with any piece of skin within reach (such as...

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