My question involves juvenile law in the State of: South Dakota
Forgive me if this is the wrong section.

First off, my images only depict adults, and none of these images depict myself.
I'm an artist and I create nude portraits (photographs). However, I don't trust society to agree with me that these are "art." So, for this discussion: assume that they're non-artistic nudes.

I have large prints of my images on my wall. If a minor comes into my home and sees them, have I committed a crime?
And if I'm outside of my home and show these images to anyone else that's underage, e.g. a family member, have I committed a crime?
I'm assuming not (at least in the first case), because I imagine that otherwise every parent who watches a T.V. show with nudity while a minor is present would be a criminal.