Touching heads
Human emotional expression From Wikipedia, the free encyclopedia
Touching heads is a uniquely human emotional expression that does not occur in nonhuman primates.[citation needed] All races, age groups and sexes of humankind interpret this behavior as an expression of positive emotions, such as love—including brotherly love, friendship etc.
 | The examples and perspective in this article may not represent a worldwide view of the subject. The specific issue is: definitely not all cultures touch heads. in some places, "touching heads" is just weird. (March 2016) |
It is absent in other apes, though they tend to use the same bodily expressions of emotions like humans.[1] A 2012 study claimed that this behavior likely evolved in humans to share head lice among friends and relatives. Head lice infestations might serve as a protection against body lice by inducing cross-resistance. This can be adaptive because only the latter type of lice transmit potentially lethal human pathogens.[2]
References
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