You can use the hole you prefer but both is better

Which hole do you prefer?

Which one hole do you prefer?

Which hole do you prefer?

You have two options, which hole do you prefer?

Which hole do you prefer?

Which one hole do you prefer?

I prefer fucking my ass hole

He knows which hole I prefer

Which hole do you prefer?

Which hole do you prefer?

I think you prefer this goth's back hole to fill up, right?