The gifts recipients love the most are tangible evidence the gift-giver loves them. According to Dr. Ahuvia, a professor of Marketing at the University of Michigan, we merge a person into our sense of identity when we love them, and we do it by gaining intimate knowledge about the loved person.
When others give us a gift that reveals intimate knowledge, it confirms their love and concern. Dr. Ahuvia says for someone to feel seen, you have to "really" look at them.