In the past, the fastest and the most used rule in parenting was "Do Not yield to the kid's will", and it never worked, not matter how disciplined children used to seem. Behaviour remained negative, even if it surfaced on a deferred stage. Stubbornness accumulates and rises when time is right,. In present time, parents started doing the exact opposite and the result was.... still bad!
You're about to deliver your baby, the day you're long anticipated, but you want to make you sure you have not missed a thing to be ready to receive him, with a house fully equipped with, let's say, the most essential needs.