I don’t know that I would say that it is wrong, morally. It is fucking disgusting though, like from a sanitary perspective, it is indicative of an aberrant psychology and poor judgement, likely detrimental to your health, it would have massive social consequences if people knew about it, and there are far more safe, healthy, and socially acceptable ways to achieve the same ends. So you objectively should not be doing that. But I don’t think that it is any more morally wrong to fuck a rotting carcass than than to eat it. I would still highly discourage both practices though.