i 'm grunting like an animal as i feel my sac tighten and explode , and then i 'm pouring myself into her , emptying my balls into her tight pussy , and she 's biting at my ear and my shoulder , her nails clawing down my back , and my cock is pounding into her crazily-slapslapslapslap-wet squishing sucking heat and clenching muscles and sweat and the smell of sex and her breath on me and i 'm biting her nipple until she shrieks in equal parts pleasure and pain .