I guess if it isn't flirtatious, then I'm left with the question of being so regressed and child-like in sessions (which seems to be the interpretation if it isn't adult flirtatious behavior.) I think the question is what do you get from being in such a state of mind, and what is your T seeing that he believes it's wise to encourage such a state? Ultimately the concern isn't individual moments of behavior, but any pattern which promotes a state that isn't conscious, chosen, and functional and whether that is what you believe is healthy for you.