Someone said :
You're hypothetical situation in the chemist happened to me nearly verbatim in the past week and a half.
As a very occasional purchaser of condoms I asked a nice middle lady in a large chemists to show me where the sunscreen and condoms were. She helped me pick out suitable sunscreen but passed me over to a much younger male colleague who she said had much more experience with condoms.
My chemist story is when I was getting one of the Hep vaccines in college years ago. It was recommended for gay men, and while the college doctor could prescribe, I had to buy it. At the pharmacy's prescription counter, the nice lady looked at the prescription and then, in front of other customers, asked me why I was getting it.
"Because the doctor prescribed it", I said.
"Do you do some work in the prison?", she probed.
"Are you a volunteer with the homeless shelter?", she asked.
"You must be a medical student", she announced.
"I'm not. They don't teach medicine in UL."
I wish I'd had the confidence to conclude: "The doctor prescribed it for my sexual health".