Master in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9604715783/9359863878. Oxytocin is produced by the posterior pituitary that helps contractility of the uterus helping rapid transport of sperms towards the ovum. The intense sexual sensations that develop during orgasm also pass to cerebrum and cause intense muscle tension throughout the body. After the culmination of sexual act this gives a sense of satisfaction.