Sex after 50? After 75? But of course

Life without sex might be safer but it would be unbearably dull. It is the sex instinct which makes women seem beautiful, which they are once in a blue moon, and men seem wise and brave, which they never are at all.

http://www.philly.com/philly/health/20131020_Sex_after_50__After_75__But_of_course.html