If it hasn’t been said, it needs to be said: R. Kelly is the greatest sex-song artist of our generation. In the past two decades, no musician has pushed the limits of sex-song etiquette more than Kells. He sings about the sinful. He tunes on the taboo. He belts out the business. If you ever need some music to smush to, press play on this R. Kelly playlist, and you’ll see exactly what I’m talking about.