It may be innocent. Maybe. But when you know the monkey like I do you learn not to trust the monkey. (Trust the Monkey made some great videos back in the 80s. You should look them up.) We do not have the luxury of wait and see or live and let live. We can't just dismiss this as a monkey lifestyle choice.
If we do then we will wake up one day to an improved monkey. The Khan Noonian Singh of monkeys. It's time to put an end to this. Your children will thank you.