Why do some men like girls with childlike personalities?

LaFemmeFatale_1
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?
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