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Science

What do population geneticists and craniofacial researchers say about the biological basis for differences in jaw shape and chin prominence among different ancestral groups?

What the evidence shows Population geneticists and craniofacial researchers do not describe jaw shape or chin prominence as coming from one single "jaw gene." Instead, they describe a mix of many genes, embryonic development, population history, and mechanical use of the jaw 2 4 20 57 . What genetics contributes...

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Health

What are the possible psychological reasons behind non-sexual fantasies about being physically hurt, and are they considered a normal part of human experience?

Short answer There is no single agreed psychological explanation for fantasies about being physically hurt, and most research looks at related topics like BDSM, self harm, and violent fantasy rather than these exact non sexual fantasies 1 76 . Still, the available evidence suggests they are fairly common and are...

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Science

What psychological factors explain non-sexual fantasies of being physically hurt?

What might explain non sexual fantasies of being physically hurt The evidence does not point to one single explanation. Instead, it points to several overlapping psychological reasons. Fantasies in general can be entertaining, distracting, frightening, or arousing, and they can help people understand wants and needs or plan for the...

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