Thank you both.
My hairdresser uses Big Sexy Hair oil. I told him that sometimes I use Potion 9 - he said that was good too.
I have a question - he straightened the other day - I am not planning on washing it for a few days since I LOVE it straight; The ends are starting to curl up. If I want to run the iron through my hair, should I put on some oil on dry hair? If I wet it, it will curl up and I can never straighten it the way it is now.....