Not uncommon at all among chimpanzees. Jane Goodall was appalled when she first encountered it, but it is well-described.
"Eat me, Old Man."
***hours later***
"Daddy, are there more barbecue pork chops?"
" Sure, baby, all you want... no, not that one Honey, the pork chop with the tattoo on it is for Daddy..." :^O
more information that I didn’t know earlier! thank you