Answer:
You need to do some historical, cultural and sociological research. There is not a comparable market for selling men. Women have always been sexually exploited by men because they have all the power and authority to do so. In many countries they are still considered property. In many countries the police and legal authorities permit sexual slavery and sexual abuse of women since they do not consider sexual violence against women to be a problem, nothing out of the ordinary, to be expected. Raping women is considered a reasonable result of one group conquering another in war.
You are trying to compare two non-comparable situations.