I adore persimmons, so I have tons of peels and bits around the house. My crickets won't touch it, the superworms eat everything else first, and the isopods love it more than anything else. Snails seem to be indifferent. Generally, I don't even offer it to the crickets or supers anyone.
Not sure about the "numbing sensation"... I like hachiyas and love love love fuyus. I've never experienced any weird mouth sensation before.