"On your knees then" he said, applying a gentle yet firm push downwards on my shoulders. Obediently I knelt down before him. I was naked whilst he remained fully clothed, his stiffening bulge now tantalisingly close to my face. I looked up at him expectantly as he unzipped his fly, fiddled with a button on his underwear and then whipped out his semi-erect cock. My own twitched in anticipation as his bobbed invitingly before me. I wanted to reach out and stroke it, admire it for a while before pleasuring him, but he had other plans. "Open..." he commanded, and instinctively my mouth obeyed. "Stick your tongue out..." and again I did as ordered without hesitation. "Good boy" he murmured as he grasped a handful of my hair and with the other hand began rubbing the head of his dick over my tongue and lips. I could feel him hardening as he did so, and he stopped to wipe his pre-cum onto my cheek. Without saying another word he lined himself up at my lips and grunted as he pulled my hair, forcing my head down onto his now fully hard cock. It took me somewhat by surprise, and I gagged as his length hit the back of my throat. My cock twitched as I did so, and my eyes watered. My hands remained on the floor though, so only my mouth would have contact with him. As he slowly released the pressure on my head and let me up for air after the first thrust I looked up at him with my watering eyes and mouthful of his cock, and saw him grinning down at me. "Mmmmm, that's good", he whispered. "You love sucking cock don't you, you little slut?". I couldn't answer properly with my mouth full, so I nodded and gave a muffled noise of agreement, then started sucking in earnest. I bobbed my head up and down his shaft, his hands firmly gripping my head the whole time as he guided my pace and depth. Occasionally he would want fast, shallow movements with my tongue swirling around his fat head, sometimes he would be slamming my face deep and fast into his crotch. A few times he would hold me down as deep as he could until I gagged, before pulling out and wiping off on my face or hair. He'd admire the mess he'd made of me and then get back to fucking my mouth. All too soon he was nearly finished with me. His breathing got even heavier and his grip on my hair tightened. Recognising the signs I looked up at him, his cock still throbbing in my mouth. I didn't know where he was intending to cum. "Awwww yeah, I'm gonna cum!" he groaned as he grabbed the base of his cock. "Ready?". I knew it didn't matter if I was ready or not, I was going to be getting it anyway! As a sign of agreement I moaned around his dick as it stiffened and started twitching. I had guessed from how late he left it that he was going to spunk in my mouth and make me swallow it, but he suddenly pulled my hair back bringing me off of his cock and forcing my face upturned, looking him dead in the eye again. I barely had time to stick out my tongue as he grunted and the first blast of cum hit me, plastering from my lip up to my eye. He moaned as he shot several thick ropes of his spunk all over my face. I could feel it dripping down my cheeks and chin as I licked my lips, savouring the salty taste. He finally released his forceful grip on my hair, wiping the last few drops of his jizz into it as he did. "Mmmmm, there's a good slut" he praised me as he fed his softening dick into my mouth once more. I sucked him in deep, using my tongue to clean all the cum off the head and shaft. He pulled out his phone and took a few souvenir pics as I was finishing. When I was finished I sat back satisfied with a job well done. "You free again next week?" he asked as he stuffed his cock back into his trousers and zipped up. How could I refuse?