Picture Perfect (1997)

Continuity mistake: After Nick becomes a hero, he wears a cast on his right arm. However, when he and Kate go to dinner with Kate's boss, Nick's cast mysteriously disappears for one shot. They are sitting at the table at the beginning of the dinner and Nick picks up a glass with his right hand, with no cast. The next time you see Nick, he has a cast on his right arm again.

Kate Mosley: I don't know, Sam. It just feels wrong, you know? It just feels really, really wrong.
Sam Mayfair: Well, good, 'cause that's the feeling... that you feel... right before... it feels - incredible.

Question: Kate says that Sam will always be a guy who sees what someone else ordered at a restaurant, and wishes he ordered that. What does she mean?