Is it vegan to consume semen? It's made by an animal.

As long as there's consent, yes. Animals can't consent, but humans can. As long as you consume human semen, it's vegan. The donkey semen the contestants drank in that one episode of fear factor is not nor could ever be vegan.

So with that logic I can make vegan cheese if I use a consenting women's breast milk. Correct?

Yes. In contrast to dairy milk, that would mean that you are not forcibly impregnating the mother and murdering her baby.

what about the restaurant at the end of the universe? where they breed super intelligent cows who can consent to be eaten, and want to be eaten.

I get the whole breeding program is definitely non vegan, but the final cow?

That makes sense thank you

That's a lot of the argument around lab grown meat which has technology discovered through nonvegan means, but that really depends on how far you want to take veganism. Would you reject most medical procedures because they were developed through nonvegan means? I wouldn't, nor do I think people should, but if we created a species that only wants to die, that seems very unethical and like we're taking away their free will. Can they really consent if they only ever want to die? I don't think so, and I wouldn't wish that existence on anyone.

didn't realize that science fiction thought experiment was relevant to medicine. if we were to throw away all the research and knowledge we acquired through non ethical means, we would kill so many people.

Everything gross in this world always seems to tie back to Joe Rogan somehow

That makes absolutely no sense.

breed

Commodification of animals speciesism, which is the root of what makes something non-vegan.

Consent to which part, though? Are we allowed to trick people into knowingly jizzing into jars if we never disclose that we're consuming it from the jar?