"Aliens" are simply future humans on the hunt for sex toys

What we think of as aliens are, in fact, "us" from the future.
Let me explain why.
First, appearance. See those huge heads? We evolved to use our brain more (mostly to store pornography) in the near future. This is also the reason for our large eyes, to better view our HappyScreens. The mouth and nose are smaller, due to the "food" that the AI helper robots produce for us. It's more like Kibble, really, and that naturally led to an almost total loss of sense of smell.
Of course at that point, we stopped bathing regularly. What was the point? There was no real sense of smell any more, and we no longer had to impress the opposite sex. Chads and Stacys were the only humans still breeding after the AI took over and made us pets. It loves "Pure Breeds".
Often when people run into an "alien" in our timeline describe a horrible smell. This is why. Did you ever smell the chimpanzee house at the zoo? Or a San Franciscan? That's what we smell like in the future.
The AI overlord lets us run around free in what is left of the cities. Most of the non Chad-or-Stacy types simply stay at home and masturbate(if male), or live with their partner(if female). This leads to tons of spare time for the males.
The AI figured out time travel early on, and gave the humans time machines. They were allowed to use them if the desired result made the AI system "LOL".
Of course, the Incel Horde came up with what the AI found hilarious, and served their purposes at the same time.
All of the livestock mutilations that we have seen on this timeline are simply these humans coming back to retrieve "ingredients" for lifelike sex toys.
The AI finds this conduct hilarious, and in turn allows the humans to carry on.
As "comfort animals", of course.