This is a unique contribution to the studies on population mobility and sexuality risk focusing on Lagos, Nigerias most populous metropolis and one of the worlds fastest growing megacities. Employing a robust data acquisition method the study compares the bio-social attributes of the circulatory and non-circulatory traders for theoretical insight. It then analyzed the structure of trips to regional destinations by circulators and their sexual transactions. It goes further to compare the local dimension of risky sexuality profiles of the circulatory and non-circulatory traders. In doing so,...