I like the explanation in your first line, but so what? Is Bob's sex life really anyone's business? Is Joan's sex life really anyone's business? No more than yours or mine is.

"with my belt wrapped around my head, and you, just sittin' there.."

"you look so fine in it, honey can I jump on it some time?"

"I bit into the root of the forbidden fruit, with the juice runnin' down my leg"

etc....

His songs are full of sexual double entendres, but not swear words. That's one of the things that's kind of cool about his writing. It's raunchy and tasteful at the same time. That indicates intelligence, rather than the desire merely to shock (as is typical with most rockers). He doesn't seem to smoke on stage either, though he smokes like a chimney offstage. I appreciate his sense of propriety when it comes to musical performing.