Apes who are removed from the struggles of wild living easily develop addictions. Sam the Monkey is famous for his love of soda, cigarettes and beer. Three of the most common human addictions.

Its just hard to get addicted to things you never get to touch or that will get you killed fucking around with in the wild. And sex has millions of years of evolution to control in any social animal (usually with literal violence and fear keeping everyone except the leader from getting any).