I spend at lot of internal time laughing.
And I've been caught doing this at work, and I once felt that I had to say something, so I said I was thinking of something funny. It was OOOOk. or alrighty then.
Someone once felt the need to hen peck me, and called me an "introvert" from there on. I remember it was said in a way as if an " introvert" was something to look down on, as in he's one of them.
Likely this is E.D as my thoughts bounce around like a monkey jumping through the trees. I can think of something humorous and the very next thing I'm playing back an airplane ride in eidetic fashion, watching the spoilers, slats, flaps deploy on landing, all with the turbo- fan whine.
These are random jumps on an eternal loop that I easily slip into, probably stemming from the lack of inhibitions that arise from this.