[ He makes a pleased noise but is clearly far too busy to reply, moving from sensitive spot to sensitive spot, putting his mouth all over them, with kisses and tiny licks and once or twice mmmmaaaybe putting his teeth somewhere just to see if it makes Sion make a different face or a louder noise.

Meanwhile, one of his hands is free and clearly the best job for that is to delicately trail his fingers around Sion's side and slowly run them up Sion's spine. Yeah that's definitely a good use for a free hand. ]