Instinctively Michael's hand went up to rub the back of his neck, thankful that not only was it dark enough out to hide his flushing complexion, but that they were still far enough away that no one else would notice. Her hand was soft and dry, while he was sure that his was going to become the very opposite. He had that sort of luck in these things and holy shit she called him cute. How is a guy to respond to that?
If he was suave, or even just a jerk maybe he would have stopped her then to steal his first kiss from her. Maybe he would have pulled her off to the darker parts of the grounds to earn his stripes... but Butters was neither, never had been. So instead he replied quietly, "Well if you're ever looking for me, start there. It may not be what I'm best at, but it's what I like the best. Plants are easy."
Girls, especially girls who started asking for the impossible and achieving the inconceivable. No one, no one would believe this.