There is an exception for JFK:
How can you, too, qualify for this exception?
1. Be the rakish scion of one of the last American aristocratic families.
2. Get elected President so that you can hang out with guys like Wernher von Braun.
3. Get all your suits custom-made by some outrageously expensive bespoke house so that your two jacket buttons are placed higher than normal. I mean, look at it--his bottom jacket button is practically on his navel. You won't find that at Dillard's.
Note how the closed bottom button works on JFK and not on WvB. Case closed.