"Yes, you can," Ron said, and placed the cup on the ground.  Hesitantly, Hermione knelt, then raised the fang and brought it down as hard as she could.  Water rose around them and then poured over them, soaking them, and as they sputtered getting their breath, they turned and looked at each other, and the next thing she knew Ron was kissing her fiercely.  She backed away from him, blushing, with a bit of a giggle. 