No, I don’t see a pattern.
Millions of men and women, myself included, have served in the U.S.Navy.
Asides from pinching Howie66’s nose and tweeking his ears, I am not weird! (Just kidding!)
Three of the people you mentioned - John Kerry, John McCain, Jesse Ventura - served during the Vietnam War period, JFK during WWII. People who experience war tend to be either non-communicative about their wartime experiences, or internalize the experiences in ways other perceive as bizarre.
DANG, I never realized that jfingkerry served in Viet Nam!! /s LOL
JC
DANG, I never realized that jfingkerry served in Viet Nam!! /s LOL
JC