I don't handle unexpected nudity very well.If my cousin would have been a boy and not a girl it would have been less embarrassing.
It's one thing if its an accident. It's another if someone isn't being thoughtful enough to warn me.
When I was young, I had a friend that thought she was lactating. She asked it I would look at her breast and see if I saw anything, or if it was in her head. I dutifully did this.
Another friend later(both were trying to conceive) whipped a boob out at me and said "look at mine! Am I lactating?" I was very angry with her.
I need warning.