I don't know about sexual lyrics but I do know that Bono's finest hour is his "orgasmic" moaning at the end of Hold Me, Thrill Me, Kiss Me, Kill Me! Lol
This is an old/long thread and someone might have mentioned this already (hell, I might have mentioned it) but Elevation is clearly about performing oral sex on a woman. Where exactly do the corner or your lips and the orbit of your hips eclipse, you ask? The clitoris, that's where.