Yea, I have actually...
I was at a party sort of thing and these girls were asking me and my frend Alex a bunch of different, sex related, qeustions. Of course the question of penis size came up, and Alex answered first: I'm about 1/4 over average(he later went on to illaberate that the average was 6 inches)
Then came my first: From 7.5 to about 8 inches.
I m about 5'10" and weigh about 140 lbs, alex is about 6'2'' and weighs about 220 or so, so he was kinda freaking after that. Then later he commented, "Oh, you meant hard? I was talkng about flaccid." then after saying this he gives me a strange look.
I knew it was a lie, and he knew that I knew it was a lie, after that he stopped trying to talk to me all together... I don't really mind, if he wants to lose a friendship over cock size let him, it's not my problem.