Bringing people gifts is a good gesture.
Ted is invited to dinner at the house of a married couple he knows.
Ted wants to go to the married couple's house for dinner.
Ted shows up for dinner at the couple's house with a nice bottle of red wine for them.
Ted goes to the couple's house for dinner without bringing anything as a gift for them.
The couple are charmed by Ted's nice gift of wine and share it at dinner.
The couple thinks Ted isn't very polite since he didn't bring even a small gift to show his appreciation for being invited.