My wife visited stereo shops with my me during our first year of marriage. That was in 1980. She has not visited a stereo store with me since.
1) Always keep your spouse involved in the buying decision process even if it comes down to, “If I buy this, I will buy you that.”
2) Salesmen are not experts. They know just enough to help you decide to buy their products. I have met just a handful of stereo store owners that really knew their stuff. And every time I found them grouchy and cantankerous with little patience to suffer fools. Seems to be a requirement. But if you are patient and humble you can learn a thing or two from them.
3) Watch the old TV Show Mr. Ed, S5 E1 titled HiFi Horse. Insightful episode that says it all about our hobby.