Communities.

I've had an epiphany of sorts.

There's a community for everything.

Fans of various pop stars, fans of various YouTubers, fans of various tv series... Fandoms. In general, people who share the same/similar interests come together and make friends and be social. They form a community. Communities outside of fandoms can include food lovers, book worms, and even people who have similar lifestyles... In bed.

Whatever it is, it amuses me that these people can come together and be friends and even find their lovers or whatever. Communities form on their own. On Tumblr, people have their own themed blog, and then they find other similar blogs, and boom. A community is formed. 

I get fascinated way too easily.