DS1 and I have a little ritual, when I'm dropping him off anywhere or putting him to bed.
It goes along the lines of:-
me- You make me happy
him- You make ME happy
me:- You make me smile
him:- You make ME smile
etc etc etc
Today he decided to change the script a bit
me:- You make me laugh
him:- You make me puke!!!
me:- You fill me with love
him:- You fill me with SICK.