I'm not sure if this is where you're coming from, but I have a fear of not being able to enjoy intimacy when I'm older. I'm in my late 20s and I have no idea whether older women I respect are having sex…I have no idea what it's like to be that age but the thought of sex ending is very disturbing. Time goes by so fast…one day I too will be postmenopausal. It's part of a fear of growing older and it's particularly strong when I feel like my life is lacking in some major way (we women in our 20s don't have too much time to dilly-dally if we want families, careers, etc.).

Anyhow, is it possible that you're somehow concerned that you're losing time that you could be enjoying sex? Or maybe losing time in some other department? What you're describing doesn't really sound sex-related…sounds like you're curious about their lives for one reason or another.