Disclaimer: Naruto is not mine.
When Kakashi kisses Sasuke, he likes to play make-believe.
Sometimes Sasuke is a young boy, nervous and shy. Sometimes Sasuke is older than him, with hair the color of snow and a body made sweeter by time. Sometimes Sasuke is an awkward teenager, unsure of who he is or what he wants. Sometimes Sasuke is not there at all, and sometimes he's far too real. Sometimes Kakashi aches for Sasuke's touch and sometimes he shrinks from the boy's freezing fingertips.
But Sasuke is always Sasuke, and that's what keeps Kakashi coming back for more, long after Sasuke has gone.