Was it your wife the divorce attorney who claimed that most of the couples she was working with were fighting over sex? I can't recall the exact phrase, but it was something to this effect. If this is true, then you can draw the conclusion:
a. The majority of couples have conflict over frequency
OR, as you did
b. The majority of divorcing couples do.
I'm curious which statement is correct.
She was extrapolating "b" therefore "a". She said, specifically, that most of her clients had complaints about money or sex. From this, she concluded, that our marriage was normal because we have conflict about sex. I was the one who pointed out that it was normal for the sample population of couples headed toward divorce.