Sexual compatibility is one of the Big Issues. Its like money and childrearing--either you agree and are compatible or you aren't. While some life events can change things slightly, or temporarily, its fundamentally one of those things that just doesn't change much. If you aren't in the same ballpark, you are much better off finding someone who is. Take the easier path on the big issues, b/c it will only hamper your ability to work together on the other important stuff.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh