You don't have to have a man! Masturbation is especially useful for older women, because men die sooner than we do. And so: Use it or lose it. It's not critical that every woman wants to stay juiced up. But if they do, it's perfectly fine. It's a lot easier to feel sexy and perform safely when you're flexible and have a certain amount of strength left. If you keep moving - walking, staying strong, doing squats - then having sex is both safer and more pleasurable, and you feel more empowered and better about yourself.