This lecture covers reproductive behavior including pre-copulatory, copulatory, and post-copulatory events. it also discusses neural control and pathways in reproductive behavior.  A portion also covers errection, in the male penis.  The lecture ends in part 2 with molecular events within smooth muscle cells of the vascular system in the penis, homosexual behavior patterns and control, and finally maternal behavior in both the mother, partner and alloparental care.  This was recorded in 2017