Sasuke is actually eighteen the first time he looks at Sakura and realises abruptly that he wants her. (In which being close friends with Sakura actually frightens Sasuke a lot less than being physically attracted to her.)

“You’re not like any kind of demon I’ve heard of.” Law said. “I was expecting a lot more of a ‘fiery hellbeast’ look.” “Nah, those’re my brothers.”

Sanji thinks he's got Zoro's number from day one, and there's not a thing about the swordsman that doesn't look monstrous. Then Sanji runs into the Vinsmokes again and is reminded what real monsters are like.