One of my old friends has an 9.5 inch cock. His girlfriend was waiting to have sex with him - so it could be special; so... he kind of hinted around that he needed to get off, so I took advantage of the situation.
I proceeded to upzip his pants and he didn't object. I started to suck his flaccid cock - I could fit the whole thing in for the first little bit, but as he got more and more excited I couldn't fit the whole of it in my throat - I was and still am not as experienced as I would like to be in the art of Sucking Cock.
Before I knew it, I was lying on my stomach and he was pounding my ass. At the time, 9.5 inches of hard cock (at first) hurt like a mother fucker; then it started to feel so good and soon enough both of us were both moaning, arching our backs, kissing and just having a good fucking time.
Since then, I have had bigger - 11 inches is the largest. He and I both had to really work to accommodate for his monster. I have not seen larger than his, but I am always looking for a challenge. LOL