A long time ago in a mountain village in the wilds of the West Kootenays, British Columbia, my seven year old daughter gave me a 'Sensitivity' plant for Mother's Day. Friends would go near it, talk to it, and/or touch it, and the leaves would close. My roommate and I could never get it to fold it's leaves. We would yell at it and even smack it a few times, no luck. Then one day a rather aggressive man visited. He had no sooner entered the room and the plant completely, every stem of leaves, folded. He said, "Oh, those things. I kill them just by being in the same room with them too long". Maybe sensitive to more than touch?
But that was the imported houseplant variety.