In the case of data, is it always yours to give? Is the fact that I am friends with Friendo my data or Friendo’s? Both? Neither? Collectively both? Taken furthe

In the case of data, is it always yours to give? Is the fact that I am friends with Friendo my data or Friendo’s? Both? Neither? Collectively both? Taken further is my contact info about Friendo mine to give? Is the photo with Friendo’s face that I took of a group of us at a bar my data to give? If Friendo doesn’t have the same relationship I have with Tech.co, how is Friendo benefitting? Where is the exchange there?