Cameo appearances in porn flicks

So I was watching a couple of porns this weekend, picked out totally at random, and was met by two unusual, uncredited performers, one on each film. The first movie, an Indian flick, showed a man and woman in a field while in the background, there stood a very content-looking elephant. Before the action started (as it were) we were treated to a two minute shot of this elephant, walking around and lifting his trunk. Very surreal, for a porn movie, right?

Well, the very next movie (which was Dutch) had a whale in it! The couple were on a boat and before they showed them, the camera focused on this whale that was wading in the distance.

Neither of these two movies were from the same director, studio or even part of the world and yet both, perhaps in an instance of cosmic destiny, chose to feature large, majestic and irrelevant mammals in the middle of my rather excessive porn habit. What is that all about?

I'm afraid to put another movie in. What if a hippo appears?