If you’ve ever considered how perfect Betty and Veronica are for each other, ever wished that Hermione had chosen Harry instead of Ron, ever absent-mindedly doodled the name Finn Dameron in the most elaborate script possible, you’re a shipper.

Shipper, short for “relationshipper,” is a person who is invested, even in a small way, in a romance between two (or more) fictional characters or public figures. And it’s been an important aspect of fan culture for decades.

On the internet, an active community of shippers has found a welcome home at Tumblr. Every year, the website analyzes its data and comes up with the most popular pairings of the year.

(The word ship and a related term, “slash,” for same-sex relationships, are often misused. Here’s a guide to usage and etymology.)