How can you make curly hair straight forever?

go to the parlor!

I didn't delete the other person's previous answer... but I have more to say than just going to the parlor. There is many hair products that are able to keep your hair straight for prolonged periods of time. But as I have horribly straight hair, and detest it, I think that you shouldn't fret so much of keeping your hair straight. It's the way you were created. Using such hair products and straighteners can destroy your hair after a while and in the end, you will regret ever doing what you had done to your hair.