@jennytheonionslayer
There is a flaw in your data, known as the Coolidge effect.
This is best summed up with following story!
Calvin Coolidge when he was US President … The President and Mrs. Coolidge were being shown [separately] around an experimental government farm. When [Mrs. Coolidge] came to the chicken yard she noticed that a rooster was mating very frequently. She asked the attendant how often that happened and was told, "Dozens of times each day." Mrs. Coolidge said, "Tell that to the President when he comes by." Upon being told, the President asked, "Same hen every time?" The reply was, "Oh, no, Mr. President, a different hen every time." President: "Tell that to Mrs. Coolidge."
Yes, on that basis - our wifely reports of 'once a day' should probably be collated and we will find 10 times a day no problem for all men .....
My contribution: the subject - one 40 year old male, not particularly fit, quite a fat tum, easily seemed to manage 3-4 times a day with ease, split between 2 women (or who knows? Maybe more!? He is an opportunist, I'll say that for him).
So first thing with me, mid morning elsewhere, sometimes 1-2pm lunchtime with me again, missing presumed in action again in the afternoon, then with me again at bedtime. Oh, and sometimes in the middle of the night. With me.
I have a theory that the more they have, the more they want.
I don't think 'slowing down' over 40 is particularly physiological. I think it's to do with hope and opportunity. They just get low and a bit bored. Oh, until someone else sashays onto the scene, in which case they pep up again.
My preferred male (not the one examined above) has always placed sex and physicality at the heart of every day, and he has not changed with the decades. This seems to me the healthiest approach. We are meant to be close to others. In the right environment, I can't see how a standard man wouldn't want sex at least once or twice a day, forever. Me too.