Why do girls do that?

I'm a single 30 year old guy with two guinea pigs as pets lol. I know that's not common. When I tell guys, they are just like oh, or may think its odd, etc. Which is fine I get it. But when I tell girls they are usually like that's cute or you're really cool, etc. They seem interested in it, more than guys who have dogs and all. Why is that? Just curious.

Why do girls do that?
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