He was aware that she was in the process of interviewing for a job with his company. It is not okay for him to hit on her in that situation, because he has power over her.

> Why should he "control" his hormones to begin with?

Because he's in a work/professional setting.

> What's so inappropriate in being confident enough to tell another person that you're attracted to them?

Nothing, if at a party, bar, or social event where people meet. In an interview at your company? Give me a break.