I use to tend bar where a guy who made his living catching rattlers came to drink (every day). Had marks all up and down his arm and claimed it didn't bother him anymore when he got bit. He didn't have many teeth either but not sure that had anything to do with the rattlers.
He brought some in to eat once in a while. I always chased it with a glass of Jack Daniels so to me they just tasted like JD. Course he could have been bringing in chicken nuggets from McDonalds and he's still laughing.