Also most man shave in the named movies. Their faces. And all cut their hairs. Why not shave your arm pits? Especially when you sweat a lot and washing is not so easy (Walking Dead…)?
Shaving other areas than the head is at least as old as Egyptians (there it is depicted). Cutting their hairs on the head, the face, in the nose, the ears, armpits and all other areas was and is quite normal. Just because some feminists want shaving to end does not mean you can’t shave whatever area you want, regardless of man or woman :) That’s how you are able to recognize a real feminist: a real feminist will fight to have her own choice. A puritan masking as a feminist will fight to see all others do as she wants the world to be.