4 Quotes by Dr. Haselton

It can be costly to engage in that behavior.

Women have a biology that can lead them to stray.

Women can't see a man's genetic make up. So, they come to prefer good genes on the outside.

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.