sexuality

Use it or lose it.

I knew that applied to neurons and gift certificates, but I had no idea it was true of female genitalia. That tissues grew thinner and dryer after menopause, yes, but not that visitor-free vaginas can actually atrophy: grow shorter and narrower. I didn’t know it because no one ever talked about it, any more than they talked about how people can enjoy satisfying, passionate sex into their 90s—if they make it a priority and embrace the ways sex changes over time. 

Feeling over-the-hill at 40? Cheer up. For a while.

Most animals, from shrimp to shrews, decline swiftly after reaching sexual maturity.  Humans, on the other hand, experience middle age: a several-decade plateau during which most biological systems deteriorate very little. This stage of life, argues writer and zoologist David Bainbridge in this excerpt from Middle Age: A Natural History, represents a remarkable evolutionary achievement that should gratify, not depress.

It never stops feeling good

In Slate’s geezer-centric issue, Daniel Engber takes a lucid look at sexual activity — or, more likely, its prohibition — in an article titled "Naughty Nursing Homes."  Engber cites an August 2007 article in the New England Journal of Medicine  about sexual activity among older people. Some predictable findings: people who described themselves as healthy were more likely to be sexually active, women were less so then men, and sexual activity declines with age. But not so fast!