yes but are such examples actually penetrative anal sex, or more akin to dry humping?
Especially chickens!
Oh, wait. Your comment was not directed toward me. Oops!
You be the judge:
Sort of like how men don’t have nipples anymore.
Exactly, not everything in life has to be evolutionarily adaptive. Look at it this way: it is evolutionarily adaptive to enjoy sex; sex tends to involve (in mammals at least) sticking a phallus in some sort of aperture; just because that aperture doesn’t happen to be child-producing doesn’t mean it won’t feel good (which is what why animals have sex in the first place). Granted, yes, if every animal stuck its phallus in a non baby-producing aperture and never in the baby producing ones (or only very infrequently in the BPA) then I’d imagine that evolution would act on it.
Also, sex isn’t automatically all just about reproduction at all. It can have other purposes, such as social ones. If a bull has anal sex with another male as a dominance ritual, the fact that it’s not reproductive is besides the point.
Humans have anal and other non-reproductive sex all the time because most sex for us isn’t about reproduction; it’s for pleasure and social interaction. It’s about social bonding or just giving mutual pleasure.
Additionally, if the high libido that led to anal penetration was associated with an increase in all matings, including anatomically viable ones, then evolutionary pressures would actually select for the anal sex havers. Seemingly pointless things can be encouraged through natural selection simply because they’re associated with beneficial traits.
Of course they don’t have anal sex. Where would they get the Astroglide? 
An excellent point!
Here is Scylla’s experience with a goat and some chickens.
A little farm girl and a little farm boy were sitting on a fence looking out at the animals in the pasture. A cow ambled by and a moment later, a randy bull trotted over and mounted the cow. “Jeez,” said the boy, looking amorously at the girl,“I’d sure like to be doing that.” “Go ahead,” she said with a smile, “It’s your cow.”
:eek:
I’m traumatized.
I heard it with the punch line: “Don’t be silly. That bull would kill you.”
A wonderful alternative!
Except having nipples cannot cause infection of the vagina.
As I see it there is a strong disadvantage for the desire, and no advantages.
And this is why the chicken didn’t just cross the road, he fucking ran across it
Then you’ve been doing it wrong.
Clearly, you don’t know the amount of towing power that Gallus gallus domesticus is capable of producing. Otherwise, the pervert wouldn’t have crossed the road.
So how was the view from across the road then?
I have personally witnessed full anal penetration between male goats on a farm. It was rape on the part of the agressor.
When I was a kid, I had some pet mice. They were segregated by sex, to avoid having many more mice. Some of the male mice would attempt to mount other male mice. The recipients of this behavior did not seem to be too happy about it, and would try to escape.