Another, seperate point on biology:

The 5 women that are spending so much time with this alpha male will find their menstrual cycles becoming synchronised (assuming, of course, that they allow natural menstrual cycling). This will therefore mean that they are all at their most sexually active simultaneously.

Assuming that the peak sex drive of a woman is more than 1/5 of the constant male sex drive, this means that at least one of those 5 women will be unsatisfied during her days of peak sex-drive.

Which is an important fact in the context.