'The Humans' is an ongoing monthly comic series by Image Comics set in an alternate universe take on 70's biker culture. Imagine if Planet Of The Apes was mixed with post-Vietnam America. And just like in the classic film the apes do own human slaves, called "skins", which they keep unclothed and treat like animals.
The titular gang of the series, The Humans are pretty clearly an allegory for The Hell's Angels in their heyday. Set in Bakersfield, CA, the series features numerous scenes of partying, fighting, drugs, sex, drinking, PTSD, drug running, and even human cockfighting. This is definitely a mature title.