As per May 2011, there is no official penis size study that have been carried out in Africa. There is also no studies that have been performed among the afro-american men population only. The common knowledge of black penises is only based on pornographic movies and rumours. Charts and figures that are found over the internet are HOAXES. None of them are based on any medical studies.
I do admit there is an over-representation of well endowed afro-american pornstars in the US porn industry. The black population only makes up 13% of the US population.
However, the porn industry is not representative of the whole male population. Some people explain the large black penis in porn movie by the ghetto effect. I am not sure about it. For instance, the actor Lexington Steele was a former trader who decided to leave his successful career in banking tl dedicate hist life to porn.
Right now, there is no existing penis size study related to the black men population. If any proper medical study exist, it should be registered at the US library of medecine on pubmed.gov
Furthermore, there is also no private study related to african penis size. Usually condom companies carry out penis size studies in order to adjust the sizes of their condom. However no condom companies ever carried out any studies in Africa. Worldwide condom companies also sell condoms in Africa. If they didn’t sell the right sizes, their condoms would not be sold in Africa. At least, we would have seen an article saying condoms are too small for african men.
During our research over the importance of penis size during sexual intercourse we never found any evidences that black men had bigger penises than caucasian, asian and others.
Nevertheless, we found something REALLY interesting by comparing the 1996 Wessells penis size study and an israeli study published in 2000 (reference). Both studies followed the same protocole. The 1996 Wessells study participants were a mix of Asian, African and European men. The average erect penis size was equal to 13 cm. The israeli study participants were all caucasian jews. The average erect penis size of the Israeli study was equal to 13.5 cm. Consequently, the presence of black men in the panel didn’t “increase” the average erect penis length in the Wessells study compared to an homogeneous ethnic population panel of Israel.