Things were melting in his brain. Oh, quite a bit of it had liquefied some time earlier, but this, -this- was approaching Three Mile Island levels. Either that, or his molecular bonds were loosening and that was causing the- the-
Magnesium burns a bright white; sulfur an unattractive, smelly yellow; sodium an interesting coppery orange. None of these facts really have anything to do with the climax of the sexual act (or the one taking place for that matter), but hey, you have to get your fun and your education where you can.
Magnesium and sunspots blurred across his mind, startling James into ignoring what his mouth was up to. This resulted in him mumbling a string of words, mixed in language and rising in volume, against Beej's shoulder until he (James) quit trembling so violently.
The words go unnoticed by the person they're addressed to, who is alternately sinking not-quite-gentle teeth into handy flesh and making some rather interesting noises. As this revelation embarrasses him, we'll move on.
-- Beginnings 2.