In Tom Peyer and Freddie Williams II's The Flash #239, the Justice League discuss whether or not they should talk to the Flash about the problems he's currently having with the media:
To drive his last point home, Green Lantern John Stewart lays his hand on Roy "Red Arrow" Harper's chest.
I may just be extremely non-physical, but I don't think I've ever laid my hand on another man's chest during a conversation before. Nor has a man ever laid his hand on my chest during a conversation before. And I'm 100% positive that's never occurred in my life with a co-worker, which is essentially what Stewart and Harper are.
And unlike Superman and Batman (or Iron Man and Captain America), who have been working together for decades (and fighting to keep their deep love for one another to themselves), Stewart and Harper have only been working together for, like, 20 minutes (Harper just joined the JLA for the first time during "The Tornado's Path," and Stewart wasn't on the League then; he just rejoined it during the JLoA Wedding Special).
Fatherly hand on the shoulder? Okay, that's one thing. But open palm on the chest? Hmm, I don't know.
Even cooler than the bizarre demonstration of physical intimacy between these guys who are having, like, their fifth conversation ever is the the expression Williams gives Stewart. Behold the bedroom eyes of John Stewart: