You shouldn't smoke just to prove a point.
Chris and Amy are eating lunch at school near the fieldhouse, Amy is flirting with Chris.
Amy wants to impress Chris.
Amy declines Chris's offer, saying she's never done it before and doesn't think now is the right time.
Chris offers Amy a puff on his joint, Amy smokes it even though she hasn't ever smoked weed before.
Chris respects Amy's choice and is impressed by her honesty, asking if she wants to hang out later.
Chris is impressed by Amy's casual attitude, but she goes on to be more forthright about her feelings than she meant to be and feels awkward.