@silkydrawers If it happened now I am sure I would not react the same. I would most likely say something like, HAVE YOU NEVER SEEN PANTIES BEFORE. Or something like that.

Not too long ago I had gone in for a test at a clinic. Next thing I know, I am on my was to the hospital.
I changes to a hospital gown in private so no problem there. Later I was moved from one wing to another. The nurse was doing in inventory of my clothes. She pulled out my pants saying, "we have one pair of pants." she reached in and pulled out the next idem. She said, "and we have a ------." I said, "It's called a bra." as she looked at the name on the bag to make sure it was mine. She said, "yes of course. And we have a t-shirt, socks and snickers." Pausing after each for me to confirm that the idem was mine.
No problem at all. My wife thought it was funny when I told her the story a few days later.