Why should he care if she appreciates it or not? He's not even saying it to her. This is a public space where people can say what's on their minds. He's not shouting at her in the street. She's very enthusiastic and has energy so he said she looks like shed be good in bed. Completely relevant and fair comment to make. He didn't even say it crassly. The world is not a hugbox. You should work on being less offended by trivial things instead of trying to change everyone else's behavior.