Suprisingly little. There are plenty of things I don't enjoy touching, but I can't thing of much that I would never touch, under any circumstances. Exept chittlins. How anyone can eat those is beyond me. :rolleyes2

EDIT: And molten glass.

I will not go near anyone wearing a flowery smelling perfume. It gives me a major headache.
Ditto, though for me it's strong scents in general.