People and things John was jealous of : Irene, Janine, Sherlock’s chair, Sherlock’s shirts, the oxygen molecules that get in contact with Sherlock.

People and things John was not jealous of : David (The man his wife dated for two years and who was in the wedding).

Sometimes I just can’t…

People and things Sherlock was jealous of: Major Sholto, every soldier who was ever less than 2 meters apart from John, Mary, every girlfriend John ever had, John’s jumper, John’s teacup, the air John breathes

People and things Sherlock wasn’t jealous of: The guys Janine found attractive at John’s wedding, Katherine (probably Irene’s girlfriend).

Same...