Would you feel the same way if the waiting period were objective? Say a study was performed with varying wait periods, the percentage of people who changed their minds and opted out was tracked, and the final length was set somewhere on this curve to minimize both the delay and the number of people who may have changed their minds. There are ethical problems with that precise setup, but you get the idea.

The human psyche is a frail and changeable thing-a pause in a long-held mental routine can lead to greater consideration at any age, not just for the young.