That's fucking gross, Sirius. Luckily, Remus loves it. Enough that the warmth in his chest spreads, and he gets an Idea. He nuzzles his nose against Sirius's, leaves a soft kiss there, and then slides down slowly so that he can replace his hand on Sirius's cock with his mouth. He presses a few kisses to the underside of his shaft, and then lets his lips wrap around the head.

What better way to show his appreciation?