My boyfriend is adamant on buying a dangerous dog breed?

My boyfriend and I want to buy a dog, and I suggested one that's easy to train and adjust to, like golden retrievers and labradors. But he's insistent on buying a "dangerous" dog, such as a doberman or a pitbull. I'm not in favour of his choices, not because they're aggressive or anything, but because they're incredibly challenging for first time owners. He then said that it's "for my protection", which is stupid since he's literally calling me a child. I'm 22 and so is he, and yet he thinks I need a ferocious dog to protect myself. I'm honestly irritated by his overprotection of me.

My boyfriend is adamant on buying a dangerous dog breed?
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