First off let me say that I don't have any kids.
But I don't think seeing your parents bucket naked would cause any psychological or emotional scars. (unless they catch their parents in the act)
If young children see an adult naked, then by nature they are going to be curious.
That's how a lot of children learn (at home). Not saying it's right, but not saying it's wrong. (no prior experience w/ kids) I just don't think kids look at that in a way that is unhealthy.
*in my grandmothers voice*
Bless their little hearts.
They are just curious about why do you have that and I don't and why is your bigger than mine. It's all in the way a parent handles it when/if it happens.
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"I don't know. you be the judge."
~Hits