 Secondly, taboos on sex may have led to a higher proportion of the need for non-marital sex to be met via sex between men, much from a smaller group of men within each person's acquaintance.Some of this is suggested by the fact that about 45% of all sex acts sold are by either male or transgender sex workers (HIV/AIDS Surveillance Project 2007).These factors may have led to a high rate of HIV transmission among MSM/MSW networks but may (temporarily) slow down the transmission of HIV to the rest of the population.