About This Answer
Asked what specifically counts as wrong sex, Ajahn Pannavaddho says a rough guide is whatever goes against society's long-established norms: not sleeping around, keeping to one partner by mutual agreement. In Buddhism, he explains, a couple who agree to live and keep house together are married, with or without a legal certificate, and should try not to break up. He advises great caution with other forms of sex, which he says cause harm whose causes people in the West fail to recognise. Asked whether either partner sleeping with someone else would be wrong sex, he says yes.