But aliens don't exist within our solar system... why would aliens come to a different solar system, create life, and then leave us with out checking on us?

Well yes, I have to agree that it is wrong to have sexual relationships with an animal; we had to domesticate dogs just so that we could own them... But now you would like to have a sexual relationship? Well let's see... first of all, sex with an animal is probably going to be dangerous. Most humans wash their hands after touching an animal, so who knows what could happen after you give them that anal... plus, we don't know how the animals would respond. Maybe they would consider it okay to pursue sexual relationships with other people. It isn't abnormal for inter species sex to occur...

See https://www.aardvarknyc.com/about/dolphins-rape-people/

so we don't really know what kind of territory we are crossing into. I'm actually afraid of an animal subjected to sex with humans could come up and rape me... but that is highly improbable and just my speculation. Plus they have those claws, considering we are restricting this to dogs and cats.

They can't consent properly; even if they agree to it, they don't have the same foresight as an adult... same concept with fucking a 14 year old. Another point, we don't know how this would affect either "partner's" body. Well I don't. Alas, a simple Google search for "Effects of bestiality" does not result in anything relevant. Plus, imagine a society where bestiality is normal and we use dogs for sex all the time... Uuuugh.