Can also be exressed as
Omne animal triste post coitum, which is how the young novice
Adso describes his feelings after being
seduced by the beautiful peasant girl in the novel
The Name of the Rose by
Umberto Eco.
I laughed out loud when I read this part of the book and then showed it to a friend who is fluid in latin. He remarded that the sentence sounded wrong but that it could possibly be some kind of vulgar latin.