You have to take into account it was the cell phone that became what the modern-day concept of a phone call is, and this is a device that's attached to your hip 24/7. Before that there was 'leave a message' and before that there was 'hopefully you're home.' ↗
He was very concerned about his children potentially being kidnapped or attached, and that's why they were covered up. When he went to Berlin zoo, there were 200 photographers. ↗
As a songwriter you have an umbilical cord to the song and it's hard to expand on your understanding of the lyrics. Whereas when you cover a song you can create your own reason why you're attached to it. ↗