When they like someone. When they are in love. And so on.
(I happen to have an ENFP friend who has been behaving very oddly in my vicinity.
Blushing, shyness, occasional muteness, embarrassment, constant staring at me, nervous laughters... Not the kind of behaviour this person usually exhibits.
But I'm not sure.
I actually doubt it... I've heard that ENFPs can behave like they were interested without actually being interested at all.
In fact, I almost never think that anyone would be interested in me (which has resulted in some shocking surprise "I luv u" statements directed to me), but this person is behaving just too uncommonly.
Help me )