It's rude to insult someone's fashion choices.
Pam's friend Joyce just bought her an unflattering outfit for her birthday.
Pam wants to respond to the gift.
Pam keeps her opinions to herself and thanks Joyce for the gift.
Pam tells Joyce that the outfit is awful and questions her taste.
Joyce is pleased that she was able tp make her friend happy.
Joyce is offended and their friednship suffers.