" How wonderful! Gnome saliva is enormously beneficial." Said Mr. Lovegood, seizing Luna's outstretched fingers and examining the bleeding puncture marks.
After male volunteers were randomly assigned to smell either one of the worn shirts, or a new unworn one, saliva samples showed an increase in testosterone in those who had smelled a shirt worn by an ovulating woman.
In addition, experts say culprits leave microscopic skin flakes traces of saliva, hairs in the material they handle and these help identify the suspect.