After he tells his father that he's going to marry this nice girl he met in the forest, he says nothing. Literally nothing. He makes no noise. He doesn't even grunt when fighting a dragon. He doesn't thank the fairies for rescuing him.
And he seemed so nice in the beginning! Sure, he creeped on Aurora a little, but she was dancing with an owl and a couple of rabbits in boots, so maybe he was just trying to be nice. He did fall in love quite quickly, but that's been known to happen too, and he did so with a refreshing lack of snobbery (if regrettably no sense of duty either). He picked up on her song, and sang it back to her, with no comment on its extreme cheese. And he has a very good relationship with his horse.
But then he rides off and gets captured, like a chump, and never speaks again.
A strong, silent type can be nice, but I think I might want some sort of explanation after the smooch. Right?