Machina Behaviour
A large amount of Machina behaviour stems from the M2 Nanomachines which they have a symbiotic, mutual dependency with. A Machina's general behaviour is a result of the 'natural' survival needs of the M2 Nanomachines, while their networked minds originated from the networking of the M2 Nanomachine units, which gave rise to not only the Clusters but also the Main Cluster which ultimately links all Machina together.
Individual Behaviour
Individually, a Machina is instinctively driven to grow and become more advanced, as well as to seek pleasure as much as possible. This behaviour facilitates the survival and advancement of the M2 Nanomachines too. Her instinctive need to experience new stimuli that tests her abilities causes new adaptations in both her body and Gene-Code, as they are linked to each other. As well, with her sexual prowess, seeking pleasure is almost always sexual in nature. The sex obsession displayed by nearly all Machina causes the proliferation of M2 Nanomachines and the sharing of Gene-Code improvements between Machina. Because Machina are driven to engage in sex as often as possible, there is no effective way to hoard Gene-Code improvements among most Machina. This removes the possibility of stagnation by ensuring that no Machina may simply accumulate Gene-Code improvements and keep them for herself to the detriment of others. Machina must always improve via their own efforts to stay ahead of the constantly-advancing baseline.