Is seeing a sibling naked that bad?

Anonymous
Over the Christmas break my family got together to go camping for a few days (its currently summer in my part of the world).
We were at a beach, and on one of the nights my brother and I went for a skinny dip in the water together.
Nothing weird or sexual or creepy happened. It was just a swim and a sit on the beach for a while.
Anyway, the next day our parents found out and they didn't really care. But they thought it was really weird.
What do you thinK?
Is seeing a sibling naked that bad?
11 Opinion