This article proposes to address the research conditions by underlying the question of male homosexuality in Senegal and to show how researcher deals with social and cultural realities in the context of "anthropology at home". It is also a discussing of medical ethics more specifically the consent in social sciences according to my research and my target population. All the data come from my ethnographic work carried out between 2009 and 2013 in Senegal as part of my doctorate thesis in medical anthropology.