stranger assfuck at park

One sunny bright day i had finished up work early and had time to kill before i had to pick up my girlfriend at the time. I decided to head to the park and head to the dock figuring I would relax a little. The dock extended out past some trees that slightly concealed the entrance. I noticed people off on distant docks but no one seemed to be on my side of the park. I noticed a man walking around. As he spotted me he turned and headed in my direction. Oh no I thought, someone bored looking to talk...I was not in the mood for conversation. As he approached strolling up the walkway to the dock end where i was, I noticed he was older, maybe pushing 70s, he was wearing jean shorts, and buttoned shirt and sun glasses. What an ugly old fart I thought to myself. He walked right up next to me and asked" how are you doing today" "alright cant complain how are you?" he replied back " I'm okay, what are you up to?" I thought for a second wondering why he would ask. " well not much killing some time before i have to pick someone up." he then asked " you come here often?" I found the questions odd, but as i looked at him I noticed his hand was rubbing on his leg. On that side of his leg was a giant bulge where his dick was getting hard. I thought to myself: what a creep, he is so trying to fuck on me...I started to feel ackward. he noticed my expression and said "whats wrong?" i replied back "nothing" He cracked a smile and said" well thats good...you haven't walked away...you wanna suck my cock? " i started stumbling over my words. at that point he unzipped his pants and pulled his dick out. It was a nice 7 inch cock now fully hard. "dont be shy" he said. the nervousness in my stomach turning into a strong desire as i decided to bend down towards his cock. I was so horny at this point. I gave it a few licks, he started breathing heavier. I then stuck his cock in my mouth tickling his head with my tongue. I could believe what i was doing.I then moved my mouth further on his dick and began blowing him. his hand went down my pants and his finger ran down my ass crack and started caressing my ass. I stood up and looked around to make sure no one was near. He asked" whats wrong?" "nothing, I want you to fuck my ass..." he got excited"you're a dirty little slut aint ya" I pulled down my pants showing my beautiful peach fuzzed ass. I could tell he loved what he saw. I spit on my finger tips and lubed my hole right before he stuck it up my ass. he grabbed both my hips. I looked back at him with a look of pleading as he started to pound my ass. It wasn't but a minute later that he dumped his load up my ass. I wasn't surprised that it lasted so quick. He slowly took his dick out careful not to let the cum leak out. "your fucking hot" he screamed. I put one hand on my ass looking back at him and said"thanks for the hot load!" he asked if he could see me again so i told him if he gave me his number id call him sometimes. i reached in my pocket for a gel pen and told him to write his number on my ass. he etched his digits on my left cheek and then gave my asshole a kiss. i pulled my pants up and walked away. I called him two weeks later to meet up and ended up taking his load at least 20 different times before we lost contact.