men paying for a prostitute are paying for companionship, men are more than capable of gratifying their own sexual urges for free, so the X factor here is companionship not sex, which you get more of for cheaper in a marriage,

however if your argument is that you do not need women and that paying a higher price for less time is cheaper in the long run,all i will say to that is that men in general are very lonely and depressed without women.