Whenever my fiancé gets mad he calls me a baby! I hate that so much!! he is 33M. I am 25F ! why is that?

I asked him for some money and he was like oh I already told you my situation. I understand that. But I told him a ahead of time.
Whenever my fiancé gets mad he calls me a baby! I hate that so much!! he is 33M. I am 25F ! why is that?
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