It's not just in music.
My wife has a Private Pilot's Licence & one day we went over to trhe Glasgow Flying Club to buy a new chart.
Although she was the one who asked for the chart & the particular designation, the guy only looked at me and spoke to me. I directed him to ask my wife, but he continued his practice much to my, and her, annoyance.
We never spent money in there again.
G.