Uusally these men have a good position in life and money.I do not mind that arrangement. It is as a rule one man and one woman. Not like prostitiution.
Oh... so the problem is when one man has sex with more than one woman?
What about when one woman has sex with more than one man? This is quite common in modern times among the young and single (or middle-aged and single) even when there is no direct exchange of money for sex involved.
I think in modern times, having casual sex is rather common with single unattached people. I don't see any moral problem with that.
Is this really what this is about?