Even more important is that while the walls of the vagina may thin, the clitoris is its old rambunctious self. There is no degradation of that organ, though a little more foreplay may be necessary because blood moves around a bit slower to the genitals as we get older.
3. You can't fire up an old engine. It's true that if you have stopped having sex, there may be some physical and psychological impediments to restarting the engine. But these can — and should — be overcome. What's the best way to keep your sex life alive and your body interested in sex? Staying fit with exercise. It will keep your heart active, your muscles strong and your mind refreshed.
If you're single, you may need a new partner to light your fire again. If you're in a long-term relationship, you may need to focus on making time for love in new and creative ways. (Or talking to a counselor if that doesn't work.) The bottom line: There's nothing about age per se that means you can't have frisky, frequent and fun sex.