Evolutionary psychologists have suggested humans possess evolved mate preferences. When long-term mating, men are hypothesized to desire fertility-related cues such as youth and physical ...

Larger penis size influences female attraction and male rival threat perception, highlighting how sexual and competitive pressures together shaped human sexual evolution.

Achieving pregnancy has been shown to be more likely between partners who carry dissimilar human leucocyte antigen (HLA) immune genes. Accordingly, humans are expected to choose HLA dissimilar ...

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