A man of 84yr and a woman of 24yr if true love abounds what could be wrong with that?

Hugh Hefner is engaged again to marry Crystal Harris a woman 60yr his junior. Many would say he is old enough to be her grandfather and even his oldest sons would be too old for her to marry. Now focus and forget it is Hef but anybody one often don’t choose where love or how love finds them, so just because one’s love (or who they really believe it is) was not even born when they graduated high school why is that all bad? What could be the biggest pitfall in a relationship with that big of a spread that can’t attack relationships of people closer the same age, excluding health which can still hit younger people? It won’t make cheating worse or anything like that, it might make cheating less because no one will want to steal a man from a woman when he is old enough to be her father. Outside the usual and expected health issues what else is there?