My 13 mos old son has unfortunately been catheterized several times. The first few times I was lucky and the nurses who did it did a wonderful job. I told them ahead of time that I did not want him retracted, and they respected my wishes. The 3rd time, however, I got a cocky nurse who retracted my DS SO fast I did not have time to react. My son SCREAMED (and I will NEVER forget that scream) and the %^%^&% nurse had the nerve to tell me it had retracted all by itself when she pulled on it just a little (which is total bull^&*&^). She ended up ripping his foreskin in several places

I was SO angry---I felt like I had done what I could to avoid the situation (I clearly told the nurse ahead of time that she did NOT have my permission to retract his foreskin) but it was futile. The %^*&^ retracted him anyway. I ended up calling up the ER manager the next day and raised holy hell, made sure this nurse never ever did this again, and sent literature to the ER manager AND spoke to her several times to make sure she understood that you should NEVER retract a baby or small child. Apparently the people at that ER are pretty behind on the times, and I have never taken any of my children to that hospital again.
If my son needed to be catheterized again in the future, before I laid him down I would tell the nurse that she absolutely did not have my permission to retract him, and that unless she could do it without retracting him that she did not have my permission to perform the procedure at all and needed to find someone who could do it without retracting him. Unfortunately, once the procedure starts if the person chooses not to listen about the only thing you CAN do is simply watch them closely and call them on it if they do it. If the situation ever arose again I would raise holy hell right then and there, when it happened to me I was so shocked and angry I didn't know WHAT to do. Now I know to make a huge stink and make sure that is ingrained in that nurse's brain so that it never happens to anymore babies again.
We do what we can to protect our little ones, but unfortunately sometimes it doesn't always work

To this day I feel horrible that my son had to go through that. He had scabs on his foreskin for a week and was in a lot of pain

It still makes me sad and angry to this day.