Why would a woman love to collect doll?

A good friend of mine needed help with repainting her home. When I open the door in one of my friend's rooms I was shocked.

My friend she is 30 and I mean she had one room separate full of dolls and barbie collection. It was girly , My friend kept telling me to be careful with her dolls as some were breakable and to be really cautious.

I tough that was weird. Why would a 30 year old woman want to collect dolls?

What makes a woman become obsessed with dolls?

Why would a woman love to collect doll?
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