Would you change clothes infront of a family member or friend of the opposite sex?

I was wondering would you change clothes infront of a family member or a friend of the opposite sex? How did you find it looking at each other's body? I change clothes with my sister but we are never nude just are underwaer. I have also changed infront of friends guys and girls. Please tell. Even stories are welcome.
Would you change clothes infront of a family member or friend of the opposite sex?
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