Charlie fisted Quin's hair with one hand and gripped the edge of the desk with the other.  Each time the metal caressed the slit he arched his back and all but sobbed from the torturous pleasure that erupted.  He rapidly approached the finishing point panting out his warning only to be denied.  Leveraging both feet off the desk edge his hips and bottom lifted and the growled out through clenched teeth,  "Let me cum, god let me cum.." the throbbing in his cock was achingly sweet but he couldn't help a halfhearted attempt at pushing Quin's hand away.