Why do guys feel a type of way when a woman says the words "we need to talk"?

I have noticed that whenever i tell my boyfriend we need to talk he gets scared and will try by all means possible not to actually have the talk. He will come up with excuses like.. Am abit low i can't talk maybe tomorrow or am not feeling okey today can we talk tomorrow. I experienced the same in my previous relationship. Why is that? 🤔
Why do guys feel a type of way when a woman says the words "we need to talk"?
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