I’ll get back to you on that but after 25 years of marriage and still doing the nasty i can safely attest that in my case that study sucks.:>)
Maybe we are an aberration?
I hope those social science dudes don’t come after me to prove their theory right.
NO offense, I hope, I was only kidding, but my own experience (divorce unrelated to homework) attests to the correctness of your observation.