So there are two arguments to be had here, one of which is only tackled partially in the argument گیا کیا پوسٹ against beastiality, the other gets underexplained. He does make another argument about offspring, but I don't find it very convincing.
So the first and easiest to explain is health. The argument about penile cancers may be true, but I express similar doubts to the responding poster. The bigger problem is zoonotic disease. I didn't have to look far to find out what we're looking at:
link Yeah, it's Wikipedia, but it's well supported. Generally, we view the introduction of new disease into the human population as dangerous. I'd say there's two major harms here that extend beyond the individual in question. Rearrangements of viral genomes and acquired genetic capabilities in bacteria are a very big deal, resulting in many of the scourges we deal with today. This is especially bad if they're transmitted beyond that person. While all of these diseases are transmitted sexually, many have other routes available that are less common, yet remain important in this circumstance. But the reality is that no change in genomics need occur. Higher prevalence in humans of zoonotic disease is inherently bad. The vast majority of new disease in humans comes from animal sources and can be spread widely. HIV, for example, isn't all that different from its simian counterpart, SIV. And their sexual spread will likely not end with these relationships, as many humans will also be engaged in sexual relations with other humans.
The سیکنڈ argument, the one not well explained, is this idea of consent. We use consent in a lot of ways to judge whether something is alright to do, whether we're talking about sex یا scientific experiments. We do a lot to animals through coercion, not taking their will یا choice into account. I would say that this is another way to utilize their inability to consent for personal pleasures. An animal, with few exceptions, lacks methods to communicate their desires accurately, and even in the case that they can, we cannot be certain that they understand their own decision well enough to make it. For these animals, it does come down to a similar situation as with pedophilia, and that gets مزید complex. So let's focus on the ones that cannot adequately communicate their views. One might struggle to call it rape, but it bears little of the certainty that comes with a consentual relationship as seen with two adults. Until we can know their گیا پڑھا مرتبہ for certain, we cannot possibly know whether they're active partners with full knowledge of the situation, willing participants who simply don't understand the situation but accept it, یا victims of sexual assault. And we shouldn't assume any of them. That uncertainty, however, shouldn't lead to action on the part of a human being, who shoulders the burden of adhering to the need for confirmation and full consent.