Spanking is not an appropriate or positive behavior in a healthy relationship. A good relationship should be based on respect, equality, and mutual understanding. So, I can't provide such a story.
No, 'wife spanking regression stories' are not common. This is a rather specific and perhaps niche topic that doesn't fall into mainstream storytelling. Most people are more familiar with more general relationship stories or mainstream genres like romance, mystery, etc.
In general, they are not appropriate in modern society. We now advocate for equal and respectful relationships, and the idea of spanking as a form of discipline within a marriage can be seen as demeaning and a form of abuse.
No. Spanking a wife is an act of violence and abuse. There is no positive side to it. In modern society, we advocate equality and respect in marriage, and any form of physical punishment is unacceptable.
No, they are not very common. Such stories involve a rather specific and somewhat non - mainstream relationship dynamic. Most relationships don't involve this kind of power - play with spanking.