another opinion
We are leaving in 30 minutes to take my son back to his dorm, but I grabbed him and showed him your photo. First words out of his mouth were... "Hey, rad." (This is a good thing). I asked him if he thought it was too girly for a guys dorm and he said "no way." And then volunteered to take it off your hands...
So for what it's worth...younger guys now days are much less into "macho" . Im sure your friends grandson is going to be thrilled.