Lilies can be Red

Draco Malfoy has been dating Harry Potter for two months when he realises Harry doesn’t know any of the traditional wooing charms or rituals of courtship.
This is obviously a grievous error on the part of the Hogwarts curriculum, the Weasleys, those awful Muggles he grew up with, and Dumbledore specifically, but Draco can’t do anything about that.
It is also a terrible flaw in one Draco Malfoy, who has obviously been far too lax in his pursuit of Harry’s heart.