By far this one:

So I was posting and responding craigslist personal ads. I received a response for one and we set up a date and time. I ended up driving for two hours through a wisconsin blizzard, with like 10 feet of visibility, 0 feet if a car went by going the other way. I finally arrive at the destination. They lady was actually a bit larger than I expected, but she got me stoned and drunk so I said fuck it. I tried to fuck her, but my dick was not big enough to get where it needed to go. I rolled off her and apologized for my tiny dick. She turned to me and said that she would give me $50 if I could make her come. So I fingerbanged/fisted her. She said it was the best orgasm she ever had in her life. Over the course of the next few weeks several of her friends called me and said she told them about me and they wanted the same. They were all very large and they were all very generous, often buying me booze and such. The last one though was the worst. This gal calls me up and tells me to meet her at some restaurant. I get there and she asked me to come to her car. She was HUGE! I'd say about 5'1" and roughly 400 pounds. She squeezed into the backseat of her car and open her legs, and told me to go down on her. I get there and her groin is covered in shit. I needed the money though, so down I went. There was even shit in her vagina, and I licked it up, crying on the inside. I finished my job and she got out of the back seat and got in her car and left. Didn't even pay me. Said she would call the cops or something. Fucking bitch.