Given our biggest dick is a Johnson that is 5ft 9, you would have thought that would bring our average. Definitely should have helped the girth average as well.
I remember studying stats at uni and an example used was some 1970s quant research carried out in the States about penis size.
Thousands of male uni students were asked the size of their erect member. The average was about 7 inches.
At the same time, they surveyed female students who were in a relationship with a man on campus. They asked them to measure the size of their partner's erection. The average was a fraction over 5 1/2 inches.
I find it very hard (fnarr) to believe that the average Dutch or French penis is 20% longer than the UK average, given the close proximity and significant population intermingling over dozens of generations.
It's equivalent to claiming the average Dutch or French man is 14" taller or has shoes 6 sizes larger...
For Western European countries, it’s all down to which region of the world the majority of your immigration comes from right? To make up the variation.