To be honest I find this disgusting and have had first had accounts of this many times while working in a Tech Supply Company Support Department around the turn of the century. We had 3 very capable females.
If we had someone request a male technician specifically we would direct them to one of the females if they were available and if someone did not want to talk to a female after the initial service we would send them to a special extension which was in a bin at the back of the room with a phone wrapped in a towel.
We would all laugh when we heard the muffled ringer
When they rang back we would direct them back to a female. If they still had an issue they were directed to the manager which would explain that the only person with the right skills to help them at this time was a female and they could call back later if they wanted, if they opted to call back they went onto a register so the next time they called they would be directed to a female.
We seriously got 2 every week.
I worked there for 4 years and I know for some products they were actually the better technicians.