Dr. Haselton
Dr. Haselton
behavior engage
It can be costly to engage in that behavior.
attracted days fertility found high men partner phase primary several women
We found that women were most attracted to men other than their primary partner when they were in the high fertility phase of the menstrual cycle. That's the day of ovulation and several days beforehand.
genes genetic good prefer women
Women can't see a man's genetic make up. So, they come to prefer good genes on the outside.
biology lead women
Women have a biology that can lead them to stray.