“He kept messing up his hair,” said Harry in a pained voice. Sirius and Lupin laughed. “I’d forgotten he used to do that,” said Sirius affectionately. “Was he playing with the Snitch?” said Lupin eagerly.(…)”He kept looking over at the girls by the lake, hoping they were watching him!” “Oh, well, he always made a fool of himself whenever Lily was around,” said Sirius, shrugging. “He couldn’t stop himself showing off whenever he got near her.”
- Harry Potter and the Order of the Phoenix (Chapter 29)