Target Market.
It has to be familiar to the target market, hence representative of the society.
There's no time in the commercial, but why did they choose *that* example? You don't see ads with strong, respected, competent fathers, either, because that's not what the mass culture is allowed to value anymore.
In another connection check out this banned Volkswagen commercial from YouTube.
Cheers!
We did do that in our bedroom with water once. 42 years later the memory of standing in line watching while my brother got his spanking from dad first, is as vivid as if it happened yesterday