I think ages here always matter. A woman must not be much older than a man, but a man should not be too old for a female. I think the gap in both cases (maximum) is 10 years.
Maturity is a serious factor in relationships, and I would like to point out that it is not nessacarily determind by age. For example, a fifty-year-old and a twenty-year-old could be in a relationship and at the same maturity level. If you're in a relationship with a guy or girl that takes advantage of you or abuses you, it makes no difference what you're situation is, they'll do that no matter what, and that's not a good person to be in a relationship with anyway. Anyone can have emotional baggage, it's not just older people. A younger person can be at a higher emotional level than the older person, and have more emotional baggage. That "dominant partner" struggle is present in any relationship-whether the partner is smarter, more mature, or older, there's one in every relationship. They just have to overcome it. Relationships with age gaps are very common these days. The way you were raised just determines if you accept it or not. Love is the only factor that should really matter in relationships.
So, in conclusion, age does not matter in relationships. The only determining factor is love and happiness. And for us to say it is wrong for a 45-year-old to be married to a 23-year-old is wrong. It is not our place for us to judge them just as it is not our place to judge two married people that are different races.