I think comparing the watch removal to the phone removal would really drive the point home - I don't think you see a lot of couples checking their watches at the same time.

I think I get the point your making - a phone is a tool, and useful, like watches and hammers. But watches, hammers, and even books aren't designed to make you addicted to them. Lots of things on phones are.

And lots of things on phones aren't... but the most addictive aspects are the most prevalent.