Severus' usually sallow skin was ablaze with rare colour, burning not just in his face but down his throat, fanning out across his upper chest. He writhed and panted, hips undulating sinuously, in time to his openmouthed gasps.
Al's careful explorations were stoking a deep burn of arousal, driving Severus slowly insane, tantalising him without even intending it.
He held off for longer than he would've believed possible in the face of such exquisite torment, clinging with a desperate, fingernail-edge grip to his resolve not to pressure Al.
But at last even his rock-solid resolve cracked, overcome by rock-hard arousal. In response to Al's latest, maddening "Hm?" he gave way at last, snarled a demanding, all-but-incoherent "Fuck!"