Beastiality Subtext

Has anyone else noticed that theres this subtext of either the dog wanting to fuck the woman, the woman wanting to fuck the dog, or the husband being jealous that the dog might fuck his girlfriend? I dont even think its that subtle. For instance when the dog gets mad after looking in the keyhole and attacks, theres not only that but the boyfriend uses the pillow to protect his genitals from onslaught.

Now some moments in the film might read as just a common jealousy of attention thing, but theres too many happenings that push a sexual element, including how the film opens and closes. The female dog at the end comes out of nowhere and thus it reads as a stand in for the protagonist. Its truly bizarre