As a clinical sexologist I have studied couples sexual habits and worked with many couples on improving their sex lives for years. There are a few factors that go into sexual compatibly, many are psychological, but some are on a chemical biological level couples may not realize at first. There are many factors that go into sexual compatibility.
I have spent years designing my own test for couples to see if they are compatible with one another and what areas they may need to improve upon or other aspects that just are not a biological match.
Now there is a test you can take before marriage! For a real test of your marriage, take it with your spouse, this may lead to better communication between the two of you.