did-you-kno:Baby elephants suck on their trunks for comfort, just like human babies suck their thumb
did-you-kno:Baby elephants suck on their trunks for comfort, just like human babies suck their thumbs. Adult elephants do it too. Trunk-sucking is most common in the young, but even old bulls suck their trunks when they feel nervous or unsure. Source -- source link
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