I appears to me that there does seem to be a bit of a trend towards younger women dating older men. Maybe it always has historically. The reason I say this in mainly anecdotal and a generalisation but it appears a trend to me:
A lot of older couples I know are men who are significantly older (10 yr +) of the women, especially when the woman is not their first long term relationship or wife.
In a few threads on here over the years I have seen older women say the men their age are only looking for younger women say 20 years younger etc.
There has been many threads where people have posted about being left for a younger women. Likewise my ex wife left me for a man about 15 yrs her senior.
On the other side my experience on OLD is that many women are only looking for an age range of men their age or older, a little bit younger but vastly older or only men who are considerately older. I see very few women's profiles that have an age range that will consider men a fair few years younger.
I have read a few articles titled the likes why millennial women want to date older men or why I date older men. I read a philological publication article that suggests that this is normal for men to seek younger women and women to seek older men, we are wired that way.
We see that in many high profile celebrity relationship the woman is often 10 years + younger than the man.
Even when I was school I remember a lot of the girls dating guys in the years above. No one could get a look in with the most fancied girl in my year group because she had bagged her self a 20 yr old bloke with a car and some cash to splash. How could any of the boys competed with an adult who had his own car and plenty of money, we weren't even older enough to drive let alone have much pocket money to spend?
Maybe there are a few members on hear who have settle down or only dated older guys. I read one poster on another thread was saying the man she fell in love with was twice her age at the time. Maybe shed some light of what is the attraction to older guys?
Yet we see/hear very little about men dating vastly older women. Obviously it happens and there are examples but it very much seems the norm for the man to be a fair bit older. Is this a really as a common a thing as the above points lead me to wonder? If so great I suppose for older men and younger women. But not so great for younger men or older women.