There is nothing wrong with realizing that a strong sexual connection is a necessity for you in your marriage. There are women out there who feel exactly the same way. Besides, down the road your fairly constant need for sexual interaction will not only make you feel deprived, but it will make HER feel bad because she can't match your level of interest. It's a recipe for failure. NOT the way you want to start a marriage.

Maybetime
I have to agree with Lil here. Not only will you be frustrated but your future W will start to feel like a failure. My H and I are in this position right now. We had a serious discussion about Passion this weekend (which I won't get into here, maybe my own thread), but the main point being that he simply sees passion Very different than me and always will. Even with subtle improvements in our SL, our expectations are so different, it makes things a constant struggle.
Please consider this issue Very seriously. It is extremely unlikely she will live up to your expectations. Why put yourself through a lifetime of this if you don't have to??

So that's another vote to run for the hills.
And from a woman to boot.