Loss

 I lose objects--not with great frequency but often enough to cause me some concern. I rarely leave home, and when I do, I bring very few objects with me. Few people enter my house, and the loss of objects is not correlated with their visits. If that's what you were thinking. 

My place of residence is small, with few places where objects can be effectively hidden. I have an office in the university I rarely use. Objects can be lost there, too, but not if I don't go there. 

A book, for example can be concealed on a shelf of books. It is not the needle in the haystack that is difficult to find (contrary to popular wisdom), but the hay in the haystack. I mean, of course, a particular, unique piece of hay, indistinguishable in almost all respects from the others. I have lost books this way, though once in a while a book will reveal itself to me again in the exact place it ought to be. 

Other misplaced objects sometimes appear. Some do not appear and eventually the pain of their loss subsides.