Is it normal to enjoy being watched

I've jerked off and had sex in front of strangers, friends and family members. I love doing it. Twice I have stripped completely naked in adult video stores and stood outside the booth so everyone could see me, I jerked off in the front of a couple of my cousins and actully once went down on 2 of them at the same time, I've let a couple of my friends watch me and my wife having sex by sneaking them in the room at night and I've done a lot of other things to be watched. When I lived with my inlaws and my wife wasn't home I would jerk off with the door open a crack so my sister and mother in law would catch me, I've even jerked off in front of one of my aunts which later lead to us having sex.

Is this normal exhibition behavior or more extreme?