Not so much watching a family member, as *being* watched... I posted elsewhere about having a very thorough exam of my penis done, when I was 11 years old, with my Mom not only watching, but actually assisting the doctor at this short-staffed clinic, when he decided I needed a minor operation on the tip of my cock.
https://en.zity.biz/index.php?mx=forum;ox=display;msg=337249
I am not making any of this up.
The other incident that I remember: at some point when I was 10 or so, my brother (who was eight) and I both needed shots. We got the bad news while in the examining room, both of us still dressed, and the nurse who was to administer them asked, “Who wants to go first?”
Well, I was doing the whole “big brother” thing, so I raised my hand... my nervous little brother certainly wasn’t going to. The nurse said "OK," prepared the syringes, and told me, “It’s going to be in your hip, so I need you to raise your shirt up and pull your pants down.”
My brother and I had seen each other in the buff, before, but there was something embarrassing about being told to strip by a big-breasted young woman, with him watching me do it. But still wanting to be "Rex Racer" to his "Speed," I fumbled with my belt, got my corduroy pants open, and pulled down my pants and underwear in the same move. Then I got my shirt out of the way.
Why are examining rooms so often over-air conditioned? The way I remember it, I got goosebumps on my bare hips.
I felt her swab my right buttcheek, and heard her pick up the syringe. I knew it was going in, in a moment, and was determined not to flinch, when I heard the nurse laugh, and ask my brother, "You want to *watch*??"
I turned around, and sure enough, he was goggle-eyed, staring at my bare butt and the needle about to go into it.
That just made me all the more determined to show off, I guess... show him that I could not only take the shot without flinching (which I did), but stand there basically naked, with my shirt bunched in my underarms, my ass bare in back, and my cock bare in front, both of which would be visible to this busty nurse, and just "keep my cool." Insofar as kids like anything about naked, I guess I liked that part.