Is it normal to like to pick others' skin/scabs?

Is it normal to get enjoyment out of things such as picking other people's scabs, popping their acne, or...and especially...peeling their skin after a sun burn? The last one I am especially addicted to, and find myself grabbing at their peeling skin even after they have told me to stop when they are not looking! It is just so fun. But I feel it is really weird. Lol. IIN?