I remember sucking on the strings of my winter coat's hood when I was really young. It was always salty, and in an interesting way. Looking back, that was probably because I was always playing in snow that could very well have had salt in it. I don't stick random things in my mouth, did when I was really young... Bath beads, a house plant, etc... Just because I wanted to know what it tasted like. The bath beads looked really tasty, and tasted really awful...
EDIT: Also, one of my obsessions is trying foods, and enjoying different tastes... I am a food connessiour. My goal is to try every edible food available to me, except bugs...