Hm, I thought about this and actually believed I had written a post about it sometime ago... but that must have been the manuscript I was thinking about. It had to do with what one delicately puts as the May/December relationship. There may be snow on the roof but plenty of fire in the furnace... to not put it as delicately. In either analogy, you must be able to see the fallacies in that sort of thinking. Would that God put such a pair together? If we look at this in its most practical form without negating the Word, you will see the mistakes that people have made and realize that there aren't any follow up stories with those relationships.
Whether it be a man with a little kitten or a cougar with a boy toy, in that perspective we can clearly see that it is the flesh being fed and satisfied. But we are peculiar and know that the flesh has been crucified with its lusts and affections so if it be the older woman and younger man or the older man and younger woman, it would not be the flesh being fed because our perspective is different and we know that God said for us not to be unequally yoked with unbelievers (2 Corinthians 6:14 KJV).
Let's delve into the scripture for a moment, knowing that we have been here before. Unequally yoked means far more than with someone who doesn't have the same faith but also with a person who isn't quite as mature as another. The babe in Christ may have some more carnal beliefs to work out as opposed to a child of God or a son of God. Though a child of God is still thinking and/or believing as a child, a son has learned to put away with childish things (1 Corinthians 13:11 KJV). Therefore, as a son, he has learned to put his faith in full swing to get what he is hoping for. He knows no other way having his full faith in God at work for all of his needs while a child is having issues with being patient in waiting for the seed of harvest to grow. Can you see where the unbelief is measured and should not be yoked together? If a son and a babe in Christ were to get married, can you see where the relationship could end with irreconcilable differences?
With this in mind, could there ever be a May/December relationship and be blessed in Christ? Well, we know that man looks at the outward appearance and God sees the heart. So no matter if man calls the older woman a cougar and the younger man a boy toy, God sees that the heart of the two people are equally yoked because of their maturity in Christ. They could very well be perfect for each other as long as they can keep their eyes on Christ rather than what other people's opinions are. This would be the same for the older man and younger woman.
The fallacy is believing what the medical reports say about older men not having the sexual prowess as they use to and that older women are more sexual than they were in their younger days. Believe as you will, I chose life sometime ago and along with that decision comes the question whose report are you going to believe (Philippians 4:8 KJV)? Would that God create a woman so that she would not be in sync with the man she was created for? If the two are equally yoked, wouldn't they be with everything? Other wise, we have found the fallacy. If one believes the medical reports about the rise of sexuality in women and the decrease of it in men as they get older and so marry based on those reports, then one cannot be disappointed when he or she finds that outside of sex, the two are incompatible.
May/December relationships are euphemised in this way to ease man's mind. It isn't something that was devised from scripture. Age being only a number is foolishness. Age is indicative of experience, the use of skills, and maturation. What one does with those years also tells the other something as well. Age tells us all more than what some would like for you to know. This is why many keep their age a secret. When we live the way we are suppose to, there isn't much to do in keeping the years a mystery - God does it for us. However, those that once lived by the code of living hard, die young and leave a good looking corpse has. Foolish words of youth, yet when we have a better understanding we dont say as much and learn to stay alert. Age would know this as well. If we were to pose an analogy of a younger man being the head of an older woman and he acting on emotion at a whim, should she have a concern knowing that they must both live by the fruit of his lips?