Desire interrupts him -- naturally -- and follows Regulus to the floor, kissing him impatiently.

"First," Desire says between kisses, ".. You will never kiss my brother, because he is hopelessly straight."
"Second, he will never kiss you," -- Still more kisses -- "because you are mine."
"Third -- And I mean this with all affection -- Yuck." And now a swipe of tongue enters the fray. "I demand that you help me lose that image, right now."