Terry,
My difficult child has shown some unusual and quite deep attachments to "inappropriate" objects.
For quite a while, my shoes would go missing, and they were later found in or under difficult child's bed. Sometimes difficult child used to try to wear them out of the house.
We've found his sister's bathing suits, a few of my t-shirts, and some...um...highly personal...um... objects belonging to husband and me, all stashed in or under his bed.
difficult child also had lots of other objects to which he would get attached, everything from cuddly toys, to specific bits of lego, pieces of string, office supplies from my desk etc.,
However, the really personal items (clothes, etc.) seemed to be more of a sexual thing, rather than just stuff he was collecting. This is borne out by the...erm...condition in which some of the things were found. Let me know if you need me to be more specific, and I'll PM you.
Trinity