The real differences that exist lie in the way sexuality is expressed. Most anything can be a turn-on at 20, but at 60, after years of sexual experience, expressions of sexuality are more refined, more evolved. The act can be at this time can be a masterwork after years study. This means that our personal relationships take on an increased importance. It is a way of solidifying our relationship with our partner and taking refuge from the sometimes harsh reality of the world.
Sex is a way to affirm the love of life.
It is an expression of the satisfaction gained from the present. It expresses the closeness of our deepest relationships and is an important measure of the quality of life.