Research done by Indian Council of Medical Research (ICMR) on 1200 volunteers all over the country, while they may display ads like this, India’s men has not meet the international standard size, and manufacturers there may force to adjust the products to suit locals need. (Link)
This kind of surprise me, not that size matters a lot to me, but I wonder is there a genetic or environmental cause behind this, has it been like this since? An expert on this matter would be appreciated.
Sidenote: This post intends no mockery; it is solely for research purpose.