I simply do not want to know how the scientists behind this paragraph arrived at their conclusions. None of us, I'm sure, requires anyone to draw a picture. Emphasis added:
Well-documented effects of oxytocin in humans include promotion of cervical dilation and uterine contraction during childbirth, and the "letdown reflex" in lactating mothers. Injecting oxytocin into the cerebro-spinal fluid causes erections in male rats, and vaginocervical stimulation releases oxytocin within the spinal cord in female rats. Oxytocin has been implicated in pair-bonding in monogamous prairie voles, maternal behavior in ewes, protective inhibition of fetal brain activity during childbirth, and so on.From Language Log.