"Older men/younger women"
It's a difficult issue. There are many situations and attitudes that come under the heading. The article on Rabble asks if it is always hideous, or if it can be innocent. Certainly both situations occur in different circumstances. Consider ...oh, what's her name that sang the theme song for The Titanic movie,... She married an older man and was quite happy about it. At the same time, these cults who practise polygamy are almost always acting in a hideous manner that is nothing if not abusive.
To some extent, we can blame evolution. Having babies is part of a survival strategy and men can contribute sperm well into old age. Women need to be younger because they are the care givers who look after the babies, (traditionally and in the timespan during which such traits evolved. Certainly young women are more attractive than older women. I've noticed, and I'm 61. It's OK, I'm not about to jump on anyone. Other than my own evidence, advertising uses sex to sell and they use young women. They wouldn't do this if it were ineffective. I imagine young men look more attractive to women too.
I keep hoping that someday fat, baldheaded, old guys, with no money will somehow become attractive to younger women. I'm all set with that, but I really don't have very high expectations.
If I've learned anything over my 61 years on this planet, it's that there are far more different kinds of people than I ever imagined when I was young. May-Dec. romances do have their place and I don't think we can dismiss them out of hand. We should, in my humble opinion, devote that energy to opposing abusive relationships wherever and whenever we find them. There's enough of those among even people of approximately matching ages to prove that age imbalance is not the only factor. Why should we go condemning people's relationships just because we ourselves are uncomfortable with them. Some are abusive when there is an older man with a younger woman, but that doesn't mean they all are.