Why would a man keep contacting his married ex after being blocked?

I accidentally caught my brother making another attempt to contact his ex girlfriend from 7 years ago. That woman is now 40 years old and has two kids by now; both young children.

My brother wasted her time back then, never had intention of marrying her and she left him. She found better. Someone else gave her the life she wanted. He contacted her twice and got blocked immediately. I caught him contacting her again and he got blocked. It's clear that woman wants nothing to do with him. If she had continued staying with him, she would've lost her chance of ever being a mother.

They broke up on bad terms. She never wanted to ever speak to him again for misleading her for too long. He wasted her 20's and was starting to waste her early 30's too. But honestly I think he's going to get in trouble if he continues trying to contact her. Why would a man do that?

Why would a man keep contacting his married ex after being blocked?
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