Why is my boyfriend so argumentative lately?

It recently started happening. He will start arguments over dumb stuff like me asking him if he can stop burping in my ear while on the phone. That or he is very snarky with me. It’ll come out of no where. He’s nice to me anytime outside of that….
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Any idea? Why do men get so argumentative out of no where
Why is my boyfriend so argumentative lately?
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