Unexpected sexual incompatibility in marriage The Bible teaches that sex should be limited to married couples. But these days many people in Western societies think that it is wise for a couple to sleep together before getting married so that they will know whether or not they are sexually compatible.

Does the Bible, or any well-known Christian authors, have anything to say about the problem of sexual incompatibility which was unexpected because the couple did not sleep together before getting married?
(This is not really a 'Christian' answer, but then your question isn't really a 'Christian' question.)

If 'sexual chemistry' is a thing, is there any guarantee that it will survive a wedding, or 7, 10, 20 years of married life and child-bearing-induced-body-morphing?

If not, your 'test drive' won't help much. You'll need something other than 'lust' to stay the course.