Researchers recruited over one hundred students. They gave them music from Itunes. The recipient who received a track with the giver’s passions, said they felt closer to the giver, as compared to the control participants.

Aknin, L., & Human, L. (2015). Give a piece of you: Gifts that reflect givers promote closeness Journal of Experimental Social Psychology, 60, 8-16 DOI: 10.1016/j.jesp.2015.04.006