I think we did it in childhood as a survival method...plus its nice to feel we have pleased someone...it depends on what we "expect" to happen by pleasing someone? Do we get angry if they do not reply to our pleasing them in a matching act? Do we then get resentful and retaliate?? lots of things involved here..yes I still want my T to think positively off me and as yet haven't reached that grand self actualise state of being indifferent to others opinons of me, but am getting there....perhaps you could say something like "Yes I do tend to do that don't I, I wonder what it is I am looking for or hoping for"???