You probably were sexually stimulated in the womb before you were born, and you can remain sexually active until you die, says William Masters, M.D., of the Masters and Johnson Institute in St. Louis. In fact, seven out of ten women older than 70 who have partners have sex at least once a week. Sex is a natural function throughout your life if you have an interesting partner and remain healthy. It's abnormal for sex to disappear. The normal person has sex until the end of her life.
Sex can also be self-affirming.
Sex can help make you feel competent. It's a way of connecting with someone else. It's one of the last processes to be affected by aging. First, the skin and your vision goes, then you get arthritis and heart disease. But you can still have sex.