if i look so unapproachable why do people still APPROACH me

Maybe you look good enough to risk rejection.

To check you out. You probably looked good from a distance. 

I can't really tell what is going on in your picture.  From what I can tell it looks like a person might be kicking.  If it were me, I would only approach you at your leg length.  Maybe they want to see how high you can kick.

Out of idle curiosity.

Perhaps the unapproachable look is what gets attention these days. If you don't want the attention then possibly you should go for approachable.  But you will probably always get some attention.