I was born in Australia but grew up in England <a href="http://ohako.tottori.jp/2009/09/16/%E3%83%91%E3%83%AA%E3%81%AE%E3%82%A2%E3%83%88%E3%83%AA%E3%82%A8/">approved pharmacy</a>  Charlotte Watts, a specialist in rape research and a professor at the London School of Hygiene and Tropical Medicine, who was not part of the study, said the study was bold but thorough and the data was reliable, "However, that 30 per cent or more of men in each country who reported having forced a woman to have sex had first done this by the age of 19 speaks to the need to challenge prevalent norms about masculinity and notions of sexual entitlement at an early age." She also added that some programs in Africa based on challenging traditional ideas of masculinity are proving successful.