Hi Grey Wolf, I am in, or will be in your position soon. I am 59 and my Asian girlfriend is 18. Like you, I wasn't looking for someone her age, and I am not with her because of her age, but because our personalities, wants, and needs were most alike. We are very compatible and have been living together for 9 months.
Back to the topic, while I love sex and in good health and condition (I run and workout), I am not the man I used to be. My girlfriend on the other hand, also loves sex and can enjoy it much more often than I can give it to her. Example: I once asked her how often her and her ex-boyfriend had sex on any given day, and she told me 6 times. Talk about an ego buster. I wish that I could give her sex that many times a day.
Anyway, I have told her that I could use some "help" to keep her satisfied. We have talked a little about swinging, but she is not sure that "good" girls do that, and also isn't sure that she can have sex without love.
Grey Wolf keep me posted and even write to my email sinsinbad@excite.com if you want to. Good luck to both of us.