At this late date in history, listening to R. Kelly document his busy sex life is like listening to an old jazzman run through standards — it’s exactly what you expect, but when he’s inspired it’s well worth your time. One of his horniest albums yet (!), Kelly’s 10th gets ridiculous fast, like on “Pregnant,” where he turns the line “Girl, you make me wanna get you pregnant” into a lubricious refrain. Kelly’s studio skills and uncommon tune sense come through on cuts like “Exit” — his warm, high-pitched melodies spin skyward over a bright piano — and “Text Me” (“Text me back somethin’ freaky/Let me know just how you wanna do me”). One nice touch: Kelly is getting unselfish in his middle age (see “Go Low,” an ode to cunnilingus).