"But I do know how a man should act around the woman he loves."
I think he knows it deep down inside, but men often don't act on what they know - especially a nice man like William.
To Harry this is how men act in real life too.
Every man may act upon appearances as they seem to him.
The man acted as if he couldn't stand to look her in the eye.
If a man acts like a leader he can lead.
In order to live, man must act to achieve values.
"And how would you think a reasonable man should act?"
Men, and governments, must act to the best of their ability.
She was used to men acting like that, but tried to be kind.