Never go for a woman purely on the basis of her looks.
As Shown By:
This one only happens in the books, but it’s a goody, and so worth including. During their visit to the Quidditch World Cup Ron and Harry are left slack-jawed by the beautiful Veelas, who serve as mascots to the Bulgarian national team. However, when angered, the Veelas suddenly transform into gruesome, Harpy-like creatures sporting scaly wings and ghastly, bird-like faces. “And that, boys,” explains Arthur Weasley, “is why you should never go for looks alone.” True story.