lux
Tourist
I have observed in zoo movies that sex is somewhat simulated and not spontaneous. The knot for example is not real, since it doesn't really hold, the dog needs to be held by the actress or a helper to look like a real knot. In some movies even the cum is fake. The only real knots I've seen so far were in some gay zoo videos where the dog is really tied to the guy. This is all a little frustrating in the professional zoo movies, we don't get to see real wild sex, just a simulation.