Many older divorced or widowed men and women are in the same boat. You're probably not desperate enough to stalk your neighbors, or to go looking for friends with benefits in all the wrong places (bars come to mind).
They feel protective of their privacy and peace of mind, but they haven't become eunuchs or hermits. But offered a chance to reconnect with someone from your past — dinner with your high school steady, for example — you might just surprise yourself by winding up in bed.
Mature sex partners do not have the best track record when it comes to using condoms, but at least they're likelier to use them when they know very little about a partner's sexual past — or present!
Personally, I think it all comes down to a very simple choice at any age: Is enduring loneliness, celibacy and extreme horniness really a better option than exchanging a few "simple gifts" between friends? Pepper Schwartz answers your sex, relationships and dating questions in her blog.
Can a casual sexual relationship exact an emotional toll?