Not done Sir, but doing.

Plenty is doing.

"Male sexual jealousy and the double standard can....probably be adequately explained as adaptations for paternity assurance."

Janet L. LEONARD, 1989, Behavioral & Brain Sciences 12.

Disclaimer: this quote appears here only to spark discussion. It is not endorsed one way or the other. Make up your own mind. Or just refresh the page for another viewpoint. From a collection assembled by the late Chris Brand.