This episode tries to polarize our species from others by saying we do not just have sex, or are attracted to others, simply for reproductive purposes. They put emphasis on "unlike other animals" as if other animals ARE only having sex, or are attracted go others, for reproductive purposes. This is demonstrably false. In fact, bonobos have a lot more sex than our species does for enjoyment (also for reducing stress and building alliances) - the one quirky interviewee asserted this as being unique to humans, meanwhile the scholarly consensus (key word here) shows this to be, again, untrue.
Attraction is also variable across different species; a lot of sexual selection remains elusive to researchers, simply due to our own species' cognitive limitations toward understanding how other animals communicate or perceive their reality. Heck, as it even states in this episode: we don't even understand how WE communicate with each other!
Lastly, not all females are choosey in the animal kingdom; you're taught this even in introductory evolutionary biology. Two-spotted gobies are one example of how females get chosen by males based on their patterning.
--> To the writers: focus on what you know, and stop making assumptions about what you do not know. This stuff is quite amateu.
PS. Way to miss out on the Major Histocompatibility Complex - which is also a key factor for attraction.
