There's an article: Believe it or not there is an article on the proposed mechanism of why this might happen and how it may be explained by what we know of in dogs along the same lines. However, the behavior is generally only noted in infants who are still feeding on bottles and "BINKIES." Rapid feedback mechanisms in a circuit connecting the jaw/lips & brain obviously is persisting in you. No worries. Be Happy!
Answered 1/20/2017
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