In reply to Donotello:
I was in primary school in the early/mid 90s and early on had a check of my testicles along with other health checks like hearing, weight and height. From what I remember it was dealt with very sensitively and not in any way embarrassing or sinister.
The check indicated that I had undescended testicles, which were subsequently operated on. Primary school students still undergo an optional health check at foundation stage (reception) which includes height, weight and hearing. Checking for undescended testicles is now done in health checkups in the first few weeks as operating on undescended testicles in the first year significantly reduces the risk of infertility and testicular cancer.*
I would also add, if you feel that these memories are worrying and upsetting it is important to talk about it, as you are doing. Often adults will start to recall memories that they had repressed as children, for a variety of reasons, from embarrassment to abuse.
*I am not an expert in children’s health checks, but unfortunately due to the surgery have some experience in the side affects it can cause so have spent more time thinking about it than most.