Fandoms
Most Fanboys/Fangirls belong to groups on the internet called "fandoms" These so called fandom groups contain pictures, videos, edits, and a million other things to do with the object or person you are a fan of.
Like, the Harry potter fandom for example: People take multiple characters and "ship" them (if you don't know what shipping is you have not been on the Internet in a million years). Then they draw or make kids for them as if the ship were to get married and have children.
But, almost every fandom does that.