The glasses thing is an issue because he's fast and rough and so could catch someone's eye with a finger, or drop their glasses and break them.

I figured since I hate having my nose touched, he may as well. "No," is all well and good, but at this age he generally laughs at it. But the nose thing, it's an instant distraction, and seems to have gotten the point home that this particular behaviour has a consequence he doesn't like.