The nice (and pretty) young lady at the Glasgow Science Museum let my 6 year old daughter stoke the back of a 2-inch-long, jet-black "hissing" cockroach. Daughter said it felt like a snail. I stood there, said nothing, carefully avoiding making eye contact ... just in case the nice (and pretty) young lady asked me if I'd like to touch the damned thing. She didn't.
Truth: there's no way on earth I'd touch it. The hairs on the back of my neck on twitching at the thought.