Study: May December Romances Good for Human Race

I read an interesting article the other day concerning May December romance...

This article states that older men who shack up with much younger women keep the Grim Reaper at bay for the human population and extend our species' lifespan, new research claims.

http://www.foxnews.com/story/0,2933,297076,00.html

Now I don't know if this is true but it sure sounds interesting.

We all know that Michael Douglas and Catherine Zeta-Jones is 25 years apart but she married him after he reportedly told her that he would like to father her children. And he has -- twice!

To sum it up, the article says that when older men mate with younger women, biologically, both mates live longer...

So, is this just an excuse for older men to seek younger women or does this theory hold water?