Im back from the field and have discovered some interesting things about these cissus sapiens.
At the latest, past the age of 30 their entire existence seems to revolve around the act of proliferation, the continuation of the species seems to be the top priority but when questioned on why, their cognitive abilities seem to break down rapidly, "bloodline", "nature", "just because thats what everyone does.." are things that tend to get thrown around.
If you question them too deeply they show visible irritation, perhaps some kind of anti memetic mind filter is in place in order to prevent higher thought? needs to be investigated more thoroughly.

They really dont seem to like things they dont understand, confusion seems to lead to increased irritation levels.

They also seem to be very low on empathy reserves, generally speaking most of them only have so much empathy to things in close proximity, could be related to their limited object permanence? Needs closer study.

Over and out.