1df541d7_Facets_of_Human_Nature__2
[0] Sexuality [1] Sporadic Only dominant males get to mate with females Females periodically in heat; visible signal when fertile. [3] Variable frequency Mostly a private affair Variety of cultural prohibitions Females sexually receptive all or most of the time; no visible signal. [2] 
Frequent All males mate with females Females periodically in heat; visible signal through longer portions of the estrus cycle, not just when fertile.
Facets of Human Nature
2