What are the climax effects of oxytocin?
Oxytocin rises during arousal and warm touch and drops at climax. This means lovers can experience its benefits without climax. There are good studies on climax effects in both people and animals.
Human
Plasma oxytocin increases in the human sexual response
Relationships among cardiovascular, muscular, and oxytocin responses during human sexual activity
Animal
Centrally released oxytocin mediates mating-induced anxiolysis in male rats