According to Kant, prostitution is morally wrong. The second formulation of the categorical imperative states that one should never use themselves, or another as a mere means. 1. I can see how prostitution would fail to respect self, as it is using one's body as a "mere means" to earn money. But how is that different from a farmer, who use his body to work in the fields to harvest crops for food and money? 2. Prostitution also fails to respect another, by using the person to satisfy his sexual urges. However, by paying the prostitute, isn't it also respecting her by recognizing her dignity and worth and paying her for her "work"? On the basis of these 2 points, can you please explain why prostitution is morally wrong?

I'm not sure that most contemporary Kantian moral philosophers agree with Kant on the morality of prostitution. As you note, prostitution does not seem to make use of one's own humanity in a way that's fundamentally different from other forms of work or labor which are clearly morally permissible. Why think that prostitution, unlike farming, involves the wrongful use of ourselves merely as a means? Much of the reason is that Kant was deeply skeptical about the compatibility of sexual desire with the moral requirement to treat rational agents as ends in themselves rather than merely as a means. He writes: “Sexual union is the reciprocal use that one human beings makes of the sexual organs and capacities of another” for the purpose of enjoyment. As Kant saw it, sexual desire is not a desire for a person's good but for the use of their body for one's own physical pleasure. Hence, sexual desire is fundamentally at odds with respect for others' rational natures. Sex is animalistic in that we treat ourselves ...

Ethics of procreation: Consider a scientist that could grow humans knowing that two thirds of them would die after suffering short lives of terror and extreme deprivation, but one third of the lives he could produce in this manner would survive to a productive adult life. We would think that if he were to create extremely bad lives rather than good lives, he would be committing Mengalian atrocities, or at least, that is what I think the general intuition would be. But there are conditions in which people procreate knowing that their children will suffer short and extremely bad lives, in subsistence conditions, where two thirds of the children they produce will suffer in this way. To ensure the two cases are analogous, suppose that the scientist creates these lives only to ensure his genetic continuation, his security in old age, or out of economic necessity, and will stop producing lives only when he has two viable children to support him and work in his lab. Can one context of procreation be plausibly...

Based on your description of the scenarios you're envisioning, I'm not seeing any inherent moral difference between the scientist and those who procreate children in the 'ordinary' or 'natural' way. Whatever moral reasons seem to weigh either for or against procreating children knowing that there is a high probability they will have "short and extremely bad lives" apply equally to the scientist as to anyone else who procreates under the same conditions. Perhaps you're seeking to highlight that the scientist 'grows' humans outside of a "natural context" as a morally significant factor that makes his procreative acts morally worse. There I'd have to say that while his creating the offspring in some sort of artificial or 'unnatural' way adds to the 'ick' factor, but it's hard to see how there's any moral difference there. No doubt many people attach some moral significance to 'naturalness' when it comes to procreation. They might argue that somehow natural procreation isn't subject to the same moral...