Current baby feeding advice is 'feed your baby when they ask for it, ie on demand'.
Without live TV we can watch any of our prerecorded dvd's whenever we like 'on demand'.
You can now buy seasonal fruits and vegetables all year round 'on demand'.
If you want to purchase something - anything - online auctions are available 24/7 'on demand'.
We know we live in a consumers society but the danger is we might end up treating God the same way.