Why do I get emotional when watching Mother and newborn videos?

I’m a single woman and not in the stage of having kids until marriage. However, lately I’ve been getting so emotional when I watch videos of a mother showing love to her baby especially when the baby is her mini me. I see the videos on my social media feed and it’s a norm to see them here and there. Lately, whenever I’m at work I just smile in amazement and it brings joy to my heart. I’m not upset nor down but it’s so beautiful to see.

I just can’t understand why I keep crying when I see the bonding? How do I identify what’s going on?
Why do I get emotional when watching Mother and newborn videos?
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