Age signifies so much more than just a number: it can reflect your maturity, your stage in life, and your experience. At the same time, age can be deceptive.Does it matter if men date younger women? If so, how much of an age gap is an acceptable one?
So as long as love is the reason for this bond then who are we to judge them. See, age gaps in a relationship only matters if people around you would start to criticize you and people can be very judgemental at times.
In my opinion, if the man/woman dating is having a double of the age of a woman(age gap) and the the older one is a widow or has a wealth in has hand, the presence of love between two might be one sided. It is also possible that the younger one is just taking advantage of it.
It is common now that love is not there as long as the one is rich and could survive the day to day living of the other then they would join for the sake of the "advantage" that they could get with each other, and I don't think that it's mutual since they would be seeking their different real interest between each other.