I am about 6" and quite thick. My wife has had much bigger men than me. The ones I've seen must be 9" or more, as well as being thick. Her current BF has a very big cock, but I've only seen it semi-erect after he's fucked her. He came out of our bedroom and into the room next door to get his clothes, so I think he wanted to, parade his bigger cock in front of me. I couldn't help saying "God - you have such a big cock", so he just grinned and said "well, your wife seems to like it. Why don't you ask her who fucks her better?". I'd heard her telling him "you fuck me so much better than my husband", so he knows he better than me. I suppose he wanted to remind me that I've lost her pussy to his bigger cock.