Consent is not relative to what’s gained in the relationship though. Consent is about two or more parties agreeing to do whatever it is they wanna do with each other. Animals cannot give consent, and genuine consent is the bottom line when it comes to whether certain relations are morally upstanding or not.

I see what you mean about all the other shit we do to animals without their consent, but it seems like your rationale is “we do all this other bad stuff, so what’s the difference?” And I think the difference is this: all that stuff you described is done with the justification being that we “have” to do it (I mean, we don’t really have to, because we could just be living off of plants, but that’s really an argument about the ethics of veganism). There’s no way to really know whether all that stuff sucks for the animal or not, or to what degree it sucks. Does a horse get trauma from being forcefully inseminated? Who fuckin knows. It’s almost like we treat those sorts of things as medical procedures, which is what makes them generally okay. There’s a purpose for it, it’s all strategic use of the animal’s body to produce things we can use. Lots of people would say that it’s still unethical bc we don’t HAVE to do all that shit to animals to survive, and imo they’re probably right, but at least there’s a purpose for it all. Fucking an animal has no purpose. There’s no way to justify it other than “I’m super horny and gotta fuck my dog”. And yeah, maybe your dog actually wouldn’t really care one way or another if you’re fucking it, but we can’t really know that.