It all came ahead the night of the Yule Ball. While their schoolmates went wild when the Weird Sisters came on stage, Graham managed to lure Angelina away from her date.
He led her into a hidden alcove, where they spent most of the night snogging. And right when Graham found the courage to slide his hand underneath Angelina’s dress, a very irate Snape roughly pulled him off her by the scruff of the neck.
Graham didn’t mind the subsequent detention for behaviour unbecoming.
After all, how many boys could say that they got detention for snogging Angelina Johnson?