Seems to me that showing the jewels to anyone who doesn't want to see them is pretty indecent.Does it make any difference if his dick was erect in the photographs
That used to be the case with indecent exposure
in public
If no erection then it wasn’t considered to be indecent
Another offence probably such as behaviour likely to cause a breach of the peace but that would have to be in public not in your own house when walking from out of the shower to another room etc