I've heard that adult chimps get strong enough to rip chunks of flesh off with their hands. If this is accurate, how old can a chimp get before roughhousing wit

I've heard that adult chimps get strong enough to rip chunks of flesh off with their hands. If this is accurate, how old can a chimp get before roughhousing with them like you do with that baby chimp is totally out of the question?Are the adult chimps you've interacted with friendly enough to reliably groom human beards without issue, or is it more of a situation where the humans keep track of which chimps they need to steer clear of?