I’m a frequent flier, but only in the middle range of frequent fliers, so when I do get upgraded from economy to business class, it’s often at the last second. A flight attendant ordinarily will come back to my seat and tell me that a seat is open in business class. I feel very self-conscious about taking that seat in business class at the last second, as if everyone is staring at me. Should I just not take the seat if this is the way I feel?

S.G., Hartford, Conn.

Dear S.G.,

On domestic flights, approximately 100 percent of the people you are joining in business class are also bumped-up frequent fliers, so please don’t feel self-conscious. The key is to behave as though you belong. So no outbursts along the lines of “Cashews? For real? Sweet! I can’t believe we get cashews! This is so awesome!” Just smile and enjoy not getting your knees crushed by the Chipotle-eating orc in the seat in front of you who doesn’t understand that just because the seatback reclines doesn’t mean you’re obligated to recline.