Man. This rocked my little world. Harry and Severus: bantering in any reality. XD
He ended up on his knees straddling Snape, who was half-sitting, leaning comfortably on pillows as he sucked on Harry and contentedly fondled his balls. Harry braced his hands against the austere metal railings at the head of the bed and thrust unhurriedly, finding as much pleasure in watching Snape suck on his cock as from the feeling of it happening.