He visited a prostitute once a week and he asked aj chah whether he was breaking any precepts.
Aj chah said no.
These percepts are not laws like the 10 commandments at christians, they are not black and white things. What he may have been reffering to if this is true, is that there is no distinction between this kind of pleasure and other kind of pleasures in buddhism. Sexual pleasures are not demonised in buddhism as been worse than the other pleasures. Surpressing this ones while leaving the other 1000 pleasures the same is not gona help too much. Quiting this should come naturally. This percept was rather put there is order to prevent querrels, crimes, unhapiness etc. that could happen if you indulge in sexual misconduct. It was not put there with the intention of making the lay person quit or surpress sexual desire, rather to guard him from bad things that may come along if this desire is not controlled at least a little.
It is easy to judge men or women who visits prostitutes/giggolo. However, if it's done to meet one's sexual needs, I dont think its breaking any precepts.
How about breaking to percepts to satisfy one's money needs ?
There are worse things that people do.
Repressing sexual needs , which is arguably one of the most powerful biological needs could lead to worse behaviors.
Sexual desires are just as biological as money desires or drug desires - 0% biological 100% mental. It is way harder to surpress the "biological desire" for heroin in a heroin addicts and still some people do it. Some people surpress their "natural desire" for food in order to lose weight. The fact that it is in the human nature to have this desire does not excuse it. It is also in the human nature to have money desires, drug desires, to kill other people etc. I do not know why it is generally believed that the human is already perfect and that the default human nature is perfection. I would say that human nature is full of defilements and the goal of buddhism is to change this animal nature of the human that makes him a slave of his instincts and desires.
Also, I would say it is rather very easy to surpress sexual desires. Been asexual, maybe it is a little more easy for me but the method is important. To lower the sexual desire all you have to do is abstain from it, like with any drugs. Try ignoring sexual thoughts 2-3 days and you will see the desire almost disappears. It's a way less powerfull desire than many drugs. It's way easier people believe it is. Just try ignoring it 2-3 days and you will see the desire does not become bigger but way, way smaller. Like with any drugs. Believing this is "natural" therefore justified and impossible to stop makes it so powerfull. Even weed would be impossible to quit if people believed it is natural, justified and impossible to stop.
The truth is, this is just like any drug and is reduced in the same way.
In the west, men pickup women from singles' bar. Many men lie and charm the women to get sex. Is that any better than paying a prostitute?
Deffinitly not. This is in my opinion way worse than going to a prostitute.
We still have not heard why the 2 persons in question here want to marry.