An Unexpected Encounter in the Store Bathroom

I consider myself straight but I do like to suck a cock now and then. Well I was in shopping at walmart and had to take a piss, so while in the bathroom a guy beside me pissing had a big cock, I caught a glance of it and he noticed and backed up a little and jacked it. He went to wash his hands as did I and since we where the only ones in there he pulled his cock out and washed it with his hand, then said follow me. I am my own man but just started following him out of the store and up at the end of the isle he had a big dually 4dr truck, he motioned me to the passenger side and I heard the door locks click, so I opened the front door, but he was getting in the back, so I did to. I looked and he was pulling down his pants and out popped his big cock. He said I think your a cocksucker and I could use a good blow job, if your up for it, I leand over and started to head for his cock, he put his hand on the back of my head and said it's all yours. I licked and sucked like crazy and finally he cut loose in my mouth and I swallowed it all and sucked for a little more. He pulled up his pants and said, well you can go back shopping and got out of the back as I did and shackily walked back in