I thought the same thing about my wife for many years. I watched her take guys with 7 and even 8" cocks and enjoy them, but I never imagined anything bigger would fit inside her tight pussy. Then one evening, we had a guy over who said his cock was 12" and thick, I did not think that was even possible, but my wife had to see it for herself. She held a 12" plastic ruler against it, and he was slightly larger, but I was not sure where she held it against him to know if it was accurate.
Then, I watched her ride him. It took a long time for her to sink all the way down on him, but she did finally manage to get down, balls deep on him. She was sore for almost a full week afterward and says it was fun but might not have been worth it.
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