It's good to help out the hard of hearing.
Sally is on vacation in the Bahamas taking a guided tour of the island, but her husband Dan is hard of hearing.
Sally wants to react to Dan.
Sally understands what the guide is saying, so she tells Dan what's being said.
Sally understands what the guide is saying, but doesn't bother to tell Dan what she hears because she doesn't want to take away from her enjoyment.
Dan learns all about the island and is appreciative of Sally.
Dan learns nothing on the guided tour and sees Sally as selfish for not sharing information.