"...If your not screwing your own wife, someone else likely is..."
"Likely" is a little hard to quantify. You don't seem to be leaving much, if any room in your analysis for low-desire married women.
I have to second that! To the poster of the original comment, surely you'd want to amend that statement after a little thought! Otherwise, you are stating that all married women are likely always having sex on a regular basis. What planet are you from? Please tell me, because I want to move to that planet!
Unfortunately, there are way too many women who are "done with that". Or as I heard one woman quoted on an advice show, "[Sigh] my husband started taking Viagra and so now I have to deal with that sex stuff again."
In fact, I'll bet that in about half of marriages where the man starts taking Viagra, the wife is not thrilled.
And likewise, I'll bet there are many marriages where the man has ED, doesn't want to deal with doctors and embarrassement, and the wife is just as happy to have it that way. It's just that you don't see any of them posting here because none of them are on a crusade to fix anything.