That type of lifestyle catches up to them when they get in their 50's and 60's, especially if they're still tryna live anything like that. Anyway most of those guys probably weren't just one-nighters, unless she was a straight up prostitute. If she's not a prostitute, then she's just as bad.
When a woman spreads herself with all those different men, a part of those men stay with her. And as a result, many of these women can develop some type of personality disorder. We just call them crazy. Many of them, as they get older, have trouble sleeping, and find themselves arguing with former partners in their sleep, which can lead to more nightmares in general. Some will actually stand up, and walk around in that dream, thinking they're awake, and as a result, can't see whats really in front of them. That's not safe. When this happens once or twice, it's bad enough. But when they're experiencing this once or twice a week, they need professional help.
People say these are spiritual demons, or bad energy, passed off by sleeping with all those different people. I don't know if they're right or wrong, but medical doctors have failed to come up with a treatment for this condition. I'd say they need to change their diet, get off the phone, and get to bed a little earlier... and take a break from the men. This will be a good start. Don't want to have to keep tying yourself to the bed every night.