OK... you know how this works.  Guess the movie from this quote, and no Googling allowed:

This is huge.  It's like monkeys learning to use tools for the first time.

Good luck.

Winner:  Congratulations to Keith Conrad for correctly guessing American Wedding...

Jim's Dad: Why do you think, uh, Michelle, they call it "making love"?
Michelle: I don't know. I just call it "boning".
Jim's Dad: Boning? Well, when-when you're doing other things with Jim, when you're not... um... boning, how does he make you feel?
Michelle: Horny, like I wanna bone.
Jim's Dad: But-but, we can't be boning from sunrise to sunset, dear.
Michelle: Oh, you've never tried it?
Jim's Dad: I certainly have. I have. I've boned... from sunrise, uh, right through brunch on more than one occasion.

Michelle: Love isn't just a feeling. It's shaving your balls.