Why're they called hemorrhoids?

Surely they should be called asteroids? :

Previous Random Joke Next
Hemorrhoid Jokes More Hemorrhoid Jokes

What did the dyslexic, epilptic with hemorrhoids say?

If I fits I sitz."

What do you call a nice guy with hemorrhoids?

A stand up guy

Asteroid Jokes More Asteroid Jokes

Why are they called hemorrhoids?

Because asteroids was already taken.

What did the asteroid say when his trajectory missed earth?

I guess I didn't plan it very well!"