Repeated sniffing of
Moth ball vapors, licking or sometimes ingesting moth balls despite health risks.
Mothballs are usually all active ingredient ; are composed of either paradichlorobenzene or napthlene. They dissolve from a solid to a vapor which is toxic. Inhaling mothball vapor = breathing insecticide. There are problems w acute ; toxic exposure
. See http://npic.Orst.Edu/factsheets/naphtech.Html#acute ;.