I agree with Diana and I'm betting either this study was limited in ways you don't realize because it's behind a paywall or it's been reported inna skewed fashion to try to entice people to pay for it.

It just doesn't ring true based on experience and a lifetime of anecdotes from friends and family.

I don't think you can separate the two, they go hand in hand. How long is this to gap anyway?

When you say womens' sexual desire decreases after marriage, do you mean their sexual desire decreases or their desire for their partner decreases? Cause I can testify to that. When my marriage was on rocks or in a state of decline, my libido, which is naturally high anyway actually increased. Just not for him. It was awful, because my libido was higher than his to start off with.

I wanted. I burned with want. I just didn't want him anymore.

You made a comment about mistreatment. There are a lot of ways to mistreat someone other than smacking them around or ignoring them. Buying flowers for Valentine's Day could be mistreatment in some circumstances.