Help me find the name of this movie?

i believe it came out in the early 2000s. it was the one where the female student needs to p this cl and says to her male teacher "i'll do anything" then he says "anything"? and then the 2 have a ual relationship. but i can't remember the name of it for the life of me! GOD! i'm wracking my brains out cuz me and my friends really wanna c this cuz we're doin a psychology thingie in cl and i thought it'd be ok to watch with them.