You know that the 100% of divorce couples were married before divorcing?
Seriously though, that may be for other reasons.
For example, if you didn´t have sex before marriage it is VERY much likely you didn´t have it because of religious reasons. If you are so religious you won´t even have sex prior to marriage, it would be far more natural that you would stuck in am arriage even if you are unhappy with it for religious reasons.
I wouldn´t think the direct reason would be sex, but more likely religious conservatism.
Doesn´t this sound sensical?