Orgasm and its Enemies: Karezza, Daoists, and other anti-orgasm crusaders

Every now and then, I get a barrage of messages from someone claiming that male ejaculation is bad, or that all orgasms are bad. Responding individually is time-consuming and unproductive, so I thought it would be worthwhile creating a general response. Perhaps this will help those of you who have run into these sorts of anti-orgasm fanatics.