I always shared a room with at least one brother so we saw each other naked at times. It got so awkward with my sister since we lived in a small house that we agreed that it wasn't necessary to put on clothes going to or from shower. After that it was no big deal and mom never said anything. We got to see each other grow up physically and I think that was a healthy thing. Maybe you could work something out with your siblings, they may have been thinking the same thing.