Another thing ENFPs think regularly: "Whoops, NOW I realize why they reacted so strangely..."
Let me explain that.
On a language course I got chatting with two people, and somehow we began to talk about the fact that in our country you've got to have had Latin at school to be able to study languages. I was totally against it. They reacted strangely. Things got rather chilly. I was genuinely surprised. Later I remembered that both those people are teachers of (taDAH!) Latin.
Or: once I greeted a distant cousin of mine by banging a hymn book over his head. He didn't appreciate it, and I wondered why. Later I realized that it's because he's so dignified and tense. (However, my aunt and Mum both agreed that a little bang over the head probably did him a world of good.)