I bet he's a sufferer of premature ejaculation as well.Why do you study the size of other men's penii? Is it a hobby, are you a Urologist, are you trying to find a man for sex, or is it your attempt at an insult because your not very - how shall I put this - sharp?
And this 'credibility' thing - what's all that about? Do you have the ability to judge someone you've never met? Don't you realise where you are and who you're mixing with? How would you judge your own credibility?