His beautiful cock was inches from my face and I studied its beauty and inhaled the odor of his meaty dick and balls. I tiptoed in and gently crawled up from the foot of the bed till I was laying face down between his spread legs. His gorgeous cock looked about half hard, laying heavy on top of his big balls. He was lying on his back, both arms raised beside his head, one leg straight out and the other half bent. His door was open and when I looked in, he was sleeping with the covers tossed off on the floor. I got out of bed and padded nude down to dad's room. My cock had been in a perpetual state of hardness since going to bed, not helped by my stroking it and fingering my ass hole. But, mostly, I kept thinking about my dad's cock and how good it had tasted when I sucked it and how delicious his cum had tasted spurting into my mouth. My imagination kept returning to the activities of the day, how exciting it had been to be naked with my dad and granddad, how hot it had been fucking first my granddad's hairy ass and then my dad's baby smooth hole. Now, it was nighttime and I was finding it impossible to sleep. That morning, dad and granddad had introduced me for the first time to the joys of male on male sex.