"It's a love potion.. in fact it's the most powerful love potion in the world." Granger finished for him, adding, "It's supposed to smell differently to each of us according to what attracts us, for instance I can smell freshly mown grass, green apples, new parchment and -" she paused and sniffed the potion again, "Caramelised sugar." A heavy red tinge had taken root all over her face when she realised the whole class hung on her every word.