Is it wrong to share a bed naked with a sibling?

I know that sounds wrong but me and my sister live together and we are really close. We go skinny dipping together quite often so we're comfortable being naked around each other and both of us have anxiety problems so we share a bed and we find we sleep better naked. We never did anything sexual. Sometimes we snuggle up NEXT to each side to side but not in a way that any of our privates would touch like spooning or sleeping in each others arms. We usually would just rub each others back and pet each others hair. And having a warm body next to me and the feeling of her soft hair and smooth skin is very relaxing. Do you think this kind of behavior is inappropriate for siblings or natural?
It's wrong to share a bed with a same gender sibling
It's wrong to share a bed naked
No it's not
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Is it wrong to share a bed naked with a sibling?
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