There's really no other way around it - R. Kelly is a fucking genius. That being said, the über-producer with a track record like Teflon is not, nor do I suspect he ever was, your average hit-maker. Especially not since the release of the complete mind-fuck that was 05's Trapped In The Closet, and various other projects that saw Kelly take chances no one else was willing to take.
His latest is thematically not all that different from anything else he's done. The first four songs on the record are about hanging out at clubs, followed by songs about freaky sex and relationship woes. Dull in theory, perhaps, but Kelly makes them work because only he's got the balls to do whole songs in which he has a one-sided argument with his lady or helps the mother of his child through the labour process (Havin' A Baby: "C'mon, girl, you gotta push now, girl").
Those lyrics may seem slightly ridiculous, but between them and his thinly veiled metaphors for his need to perform cunnilingus (Sweet Tooth), Kelly's originality and talent for making instant club hits is un-fucking-deniable.