4"-6.5" is average? Take the average of those two and that is about average...way too big a range to call average.
Actually it's a conversion from decimal to inches, rounded to the first 1/4" by me. ( 4"1/8 - 6"3/8 but that reads not so well )
It's the major class within 1 standard deviation of the real average on his 25 year experience as an urologist, so more than 2/3 of the men are belonging to this class.
The table of prof Dr.Coolsaet was just a quick reference, and maybe only valid for Belgium, but a good indication that huge (2.2%- 1 on 45) isn t so common in the world.
He advises couples together with a sexuologist on ED, but also youngsters that want a penis-enlargement. According to him - he will give in 90% a negative advice if the penis is more than 2.75" in lenght and more than 4" in girth. ( he injects the penis with a chemical - that gives you a maximal erection )
He is such an authority that the clinics in Belgium are following his advice, and the assurance of the plastic chir or clinic will not pay if something went wrong without the positive advice of him.
Sorry for this late answer. Just a clarification of a well written book, that gave me another look of the pornification of our society.
( He got the last 5years several 21years old guys in good shape with a 5"x5" functional dick for an enlargement or complaining that it is not girthy anough - even in proportion to their body it looked good he said - but they all have an average perception coming from porn, in school they should shower again together naked - like 20 years ago)