Why do some men like girls with childlike personalities?

I don’t mean childlike as childish,

I mean a person who’s cheerful, trusting, idealistic, dreamer... I mean someone who’s not afraid to be herself just because she’s expected to act the certain way.

I can be a bit childlike and playful sometimes and I’ve noticed my boyfriend is always much more sweet and caring when I act like that.

I don’t mean to fake myself, I just act like I feel and at that time he keeps saying how much he loves me and that I am so cute and he wants to constantly make me happy,

I am happy for that and I love him a lot lot, I am just curious, why do I receive more love when I act more playful, are most men attracted to the childlike traits and find it more lovable rather than serious women?
Why do some men like girls with childlike personalities?
Post Opinion