Well, not constantly but I do catch him licking the screen at least twice a day or more. I think I can remember licking it when I was a small child.
My cat Meaghan, who is 3 yrs old, has begun a strange habit - she licks the window screens! I think this is the most bizarre thing. Sometimes I.
If the cat is just tapping the tip of its tongue on the window, it could be one of two reasons. 1. It is just licking its lips and the window got in the way; or 2. It is trying.