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.
The next morning (or even that night) come the recriminations: Was it wrong to give that person the sexual green light when you had no intention of rekindling the emotional side of the relationship?
In a national study conducted in 2012, the Center for Sexual Health Promotion found sex partners over 50 twice as likely to use a condom when they regarded a sexual encounter as casual rather than as part of an ongoing relationship.
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!
For sure, people who associate intimacy with commitment are ill-suited to sex that's as meaningful as a summer breeze; for them, the FWB arrangement would be a bad idea.