My wife and I are lifelong masturbators. Both of us have been masturbating since our pre-teen years. We are both now over 70. During our early married days we kept our masturbation activities secret from each other. Even though we had frequent intercourse, we continued our individual masturbation habits. My wife caught me masturbating one day, shortly after we had been fucking. She promptly removed her skirt and panties and began masturbating. We then 'confessed' our obsession to each other.
After then we not only had frequent regular intercourse, but regular mutual masturbation sessions.We continue this to this day. We even have set aside a room for masturbation.