I thought they just meant the actor playing him is hot, but no....they are attracted to the actual clown!
If you click the tweet below you can see posts from other people saying how attractive they find him, but heads up there are a lot of expletives used in those tweets and posts.
This is what actor Bill Skarsgard looks like in real life:
Aaaaaaand here's what he looks like as a clown:
Nope. Does not do anything for me except freak me out!!! Did you see the movie? What do you think?