Dogs likely don’t lick us because we’re salty. But a homegrown experiment leaves 2 other popular hypotheses intact, according to StanleyCoren
The popular belief is that dogs lick people as an expression of affection, although there has never been any data to prove that hypothesis.
The commonly expressed hypothesis that dogs lick us because our perspiration makes us taste salty is experimentally tested here.When a dog licks its owner or a family member, most of us interpret this as a sign of affection. In fact, we usually tell children that when a dog is licking them he is giving them"kisses." The truth of the matter is that science has not established the specific reasons why dogs engage in this behavior, although there are a few popular hypotheses.
Each person wiped their knees with warm water and blotted them dry. A salt solution [10 mL table salt dissolved in 125 mL warm water] was applied to one knee with a paper towel and allowed to dry for a few minutes.
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