There has been some questions over the months that have dealt with a child and parent bathing together. In general I feel I did not look properly at the issue.
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While here in China, there is a custom here of a Bath House, man, boys of all ages go and bathe ( they have another one for women) While there are workers to scrub to get dead skin off, in a family a son may be washing his fathers back, or father the sons, And everyone is in the showers or bathing tubs or hot tubs at the same time.
There is no culture issue of being nude together.
In many toilets ( they don't call them rest rooms) they are just open rooms, you sit or squat and use the bathroom in the open with others doing the same thing.
I have even seen some young kids and elderly doing it in the park or along the road, since that is where they are at.
The human body and nudity is not considered wrong or bad, just natural and part of life.
** and until you had a milk bath you have not lived.
So really needed to readdress my answers on these to reflect the culture the people are from.