This reminded me of Dmitri Belyaev's silver fox experiment. He decided he wanted to try domesticating silver foxes. After six fox generations these wild foxes started have dog like characteristics. They started to wanting for belly rubs, develop floppy ears and dog-like snouts. Another thing these silver foxes developed is that they started to follow the gaze of humans. This article talked a lot about how mutual gaze between dogs and human increased production of oxytocin in both species which increased the motivation to establish eye contact. Its cool to see how both experiments lead to the same conclusion.

https://undark.org/2019/02/07/silver-fox-experiment/

Definition: Situated on the side and towards the back of the body Posterior: Situated behind Lateral: The side of the body

Analogous is a term used in biology to refer to body parts that have a similar function but differ in structure, such as the wings of a bird and the wings of an airplane.