On line courses in Sexology PG DIPLOMA, Fellowship, Masters in Sexology & Psycho sexual Medicine & Counselling , Govt. recognized Startup Dr Ramesh Maheshwari Best sexologist in Pune, India. . More info WhatsApp 9604715783 and 9604715783. Sigmund Freud –(NEUROLOGIST) proposed that psycho-sexual development in childhood takes place during 5 psycho sexual stages: Oral, Anal, Phallic, Latency, And Genital. These are called psycho-sexual stages because each stage represents the fixation of libido (roughly translated as sexual drives or instincts) .