Why are parents practically always right about our partners?

I've only had two partners in my life; my ex boyfriend and my current boyfriend.

My ex boyfriend:

My mother hated him more than my father. It got to the point her health started deteriorating the longer I kept allowing him in my life. In the end they were about him. Mom was right... he was a horrible person.

My current boyfriend:

My parents, other family members and friends like him. Mom's health is slowly improving now. He's described as indeed a real gentleman and a punctual person. He's never late on any date nor any meetings. My parents said I have it right this time. My mom's aunt who is critical of others and isn't an easy woman to please, even she gave him a thumbs up and said ''no comments, he's right''.

Why are parents practically (with very few exceptions) always right about a partner? If they said he/she is bad news then they're likely right. If they like your partnter then it's likely you are with the right person.

Why are parents practically always right about our partners?
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