A case of homosexual necrophilia

You forgot to add "bestiality"...

I really don't think I should ask how you know that

Many years ago when the world was young I was in my first IT job as an operator. The site was next to a river and I used to spend a fair while gazing out the window on evening shift. There were a couple of Muskovy ducks who were regular participants in horizontal jogging.

During one session they got flattened by a delivery lorry. This upset the security blokes (presumably the tedium of their lives was slightly reduced by watching the ducks shagging too) and they flew the company flag at half mast for which they got a monumental bollucking.

Can't quite make out whether there is any shagging going on or just a good stingy kicking but you can invoke similar behaviour by dangling a dead wasp on a bit of cotton in front of another wasp.

Here