An article by Oti et al. in Current Biology makes me want to buy an oxytocin inhaler (just google oxytocin nasal spray). I'll pass on the highlights and a graphic summary (click to enlarge), and you can see the technical summary by clicking on the link to the article.
• Oxytocin receptors are expressed in spinal ejaculation generator (SEG) neurons
• Oxytocin directly activates SEG neurons and influences male sexual function in rats
• Release of oxytocin in the lumbar spinal cord is not limited to conventional synapses
• Released oxytocin acts by diffusion—a localized volume transmission—in the cord