consider when you are say 65 she will be in her early 40's when women hit their sexual peak. You will ether own half of the viagra factory to keep up or she will stray out the back door to take care of business. Now this may not be true with chinese women, but give her a couple of years watching TV and find out what the west is really like and she may change.
I have a couple of friends with wife's from asia, and they brought their new wife's here to america, well they kept them indoors and away from TV, and when I asked them why, they told me it was to keep them like they were brought up (being a good and faithful) wife, because our way of life would spoil them specially with womens lib here. By the way, they were from India, but I guess this goe's for other country's as well.
By the way, should you marry this young thing and you don't have a case of viagra handy. A tounge depressor and a roll of black tape could come in handy.
Also consider when your old and sitting on the front porch, you say: do you remember this singing group, in which she won't have the foggest idea of what in hell your talking about.
Another thing, when you want to make love, you don't have to show her what you want, the older woman already knows....and that's a good thing....unless you like being a teacher....^_^