Sci-phie, I am not sure what metric of sentience you are using, it is not measurable in any scientific sense. If your definition of sentience is having a nervous system then I don't really see your point... As for most successful category of organism, the winner will always be the eukaryotes. Those bastards.

I maintain that the male rats/dogs/bunnies are humping other male rats/dogs/bunnies intentionally (as well as faces and legs). Homosexual behaviour is widely reported in virtually all species, but I am pretty confident that most vertebrate males are aware that it not a female when they mount...

Yes Jenny! Some snakes do it too.

Oh wait... I forgot about ducks, ducks let the team down...

The only thing close to this kind of behaviour in vertebrates (that I know of) are some species of snakes that masquerade as females to distract the competing males. Sometimes this backfires... and the trickster finds himself at the bottom of an incredibly randy snake pile.

Good to see the discussion is focused on his talent as an actor.

AHAHAHAAHA, oh my goodness. More confirmation of vertebrate superiority, at least we (vertebrates) check what we are putting our penis' into.

That is not your motive though, your motive is about why you want it.

Wow, aren't you a big fucking hero.

Westmark, what the fuck. She doesn't want to have sex more than once a week, can you not read? If he is happy with that then why the fuck would he move on?