Mature Man likes to Masturbate me

As usual as an eager 18 year old I was earning extra money, I was cutting their lawn on a sunny Saturday afternoon. I had always been curious about this couple as I had caught glimpses of them being nude through the windows. They usually wore a robe when paying me and the gentleman often left his open, and it excited me, seeing his large balls and a thick cock with a long foreskin. He would catch me looking and smile and close his robe.  I had removed my t shirt as it was so hot. I was only wearing cut off Jean shorts and no underwear. I felt a tingle as I walked back and forth, my eager circumcised "grower" cock rubbed the material and was getting slightly erect. My friends and I used to playfully masturbate together and I was proud that my balls were nice and large, mine was the longest at over 7 1/2 inches, ramrod straight when hard and  nice and thick, over 6 inches around, circumcised and pronounced purple head. (I used to compare my cock to my friend Dan's cock, his was thicker with an amazing foreskin, I loved laying next to him as we masturbated to see who would ejaculate first!!  He usually came first and his cum would squirt out hard, we masturbated each other and his cock was so rigid, it was fun playing with his foreskin too and I liked the way his cock trobbed with each squirt of cum!! We experimented and sucked eack others cocks and even swallowd the cum) Al I could think about was finishing the lawn and masturbating to feel the cum squirt again and again from my cock.  Well I was about half done the lawn when the elderly couple came out and sat in recliner lawn chairs in their bathing suits and were applying sun tan lotion to each other. He called me over and offered me a glass of ice water, I was self conscious and my shorts were showing my cock somewhat. I noticed they were looking at my bulge and whispering to each other.                                He called me over and said your getting red here have some sun block, and instead of handing it to me said "turn around" and started to rub some on my shoulders, it felt nice. Then he rubbed my back and I said the cream is cold and they laughed. Then as he rubbed some on my lower back I felt his fingers slip inside my waist band and actually rub my ass cheeks. I was getting aroused. She then said "do his legs". He applied cream to my legs and as he reached my crotch his fingers slipped up my shorts and as his hand swirled I felt my cock being touched, I was getting so hard my erect penis was straining against my shorts. He said turn around. I said I am so sorry, I can't help it when they saw my bulging Jean shorts. Laughing his wife leaned forward and said it's okay were all adults and he unbuttoned my shorts and tugged them down, I gasped as my cock sprang up rock hard. He started to rub cream all around my tummy an occasionally rubbed against my cock..I could see a bit of pre sum dripping and she said "ok my that must please your girlfriend, it's a delicious beautiful cock". Just then she said to me , if you prefer just go into the house and take care of that erection, there are porn magazines in the bathroom". I was excited at the thought, I pulled up my shorts and ran to the back door, he said just a moment,in the kitchen,  come over here, he was about 72 years old and lean, in the kitchen he showed me some porn magazines, and dropped his shorts, his cock was short and floppy I was shy but horney,  he told me to drop my shorts again and that we can both masturbate together, I enjoyed that there was a photo of men sucking each other and I was so excited by that, I started to stroke my erect penis and heard his wife come in, startled I stopped, she said relax, and told me to lean against the counter he then took my cock and squeezed it, she laughed and watched as he slowly stroked my rigid cock, making my big balls flop back and forth, she said "make him cum"... She stood facing me and watched and I gasped and felt my toes curl as some fun, a glob dribbled out and then squirt after squirt all over the back of her leg. It felt fantastic, then he knelt down and licked my cum off her!!. She said this is between us, bet you liked that!! I nodded yes she said you are lucky to have such a beautiful long thick cock and big balls and able to squirt so much cum. They offered me some lunch then as I finished she showed me a porn magazine with men masturbating, then as I was getting aroused, they led me to the couch and had me lay there nude, he rubbed my tummy and balls with skin lotion then started to masturbate me and soon I came again moaning in pleasure. as she fondled my balls and inserted a finger in my ass Thrilled by this great experience I went and finished the lawn and they brought me in again and he masturbated me a third time and I came very strong, but only small amounts of cum dribbled out. She said come over anytime for discrete relief as her husband lovesmy  cock . This became a regular occurance for me and she would always watch, which was a turn on, he then would start masturbating me as he lay on his back, I would straddle him, and he would have me cum in  his mouth. Before I left that afternoon, they asked if they could shave my pubic hair and my balls, I agreed and it was a nice experience, again I got an erection and they asked me to masturbate for them to watch, it took a long time but I finally felt that tingle and said "I am cumming" and came a few drops of cum but it was amazing.