This article sucks. One of the purposes of a larger penis is to displace the sperm of a competing mate and to give your sperm the farthest head start into the vagina, if long enough passing the entire hostile and acidic area that is the female vagina. Only the third world countries where rape is common and multiple partners are common would this trend show.
And even then I'm pretty skeptical on the effectiveness of this so called evolutionary tactic, though perhaps the length increases have stagnated due to the length of the female vagina. I assume a lot of the men here can hit the cervix of most women without undue difficulty, which would negate any further benefit from length at that point from this strategy's standpoint, which would decrease their advantage over their shorter dicked brethren. Also civilization kind of killed that as well, as well as the habits of women who tend to cheat, apparently they will refrain from having sex with their regular partner in many cuckolding situations and tend to cheat during ovulation, which removes the length advantage from the mechanics standpoint, the only factor left in that equation is the preference of that female.
TL;DR - France is bullshit, Italy is bullshit, Belgium is bullshit. Other white first nation countries up in the 6.3+ range are probably bullshit and ALL of these statistics are likely too high with the exception of the asian nations listed at the bottom since people lie, and the people with bigger dicks are much happier to report their numbers than the people with average, below average and hell even the people slightly above the average might not be up to it. Even some of the bigger guys might not even be comfortable with it.
Numbers that I have seen in the past listed the average american white male penis at 5.7 inches, the average african american (not the ones living in africa, important point) penis at 5.9 inches, so yes bigger, a whole 0.2 inches! And the average asian american penis at 5.6 inches, so yes smaller, a whole 0.1 inches. Not 3.8 inches. That sounds like someone purposely posting a statistic maliciously targeting our yellow brothers.