He has been teaching sexology to thousands of Swedish students, and was also very active in promoting proper sexuality education and training programs outside his own University unit. His research areas were sexual dysfunctions, sex therapy and counselling with special interest in asexuality and in pheromones. He was also a clinician and worked as clinical sexology consultant, advisor and supervisor for hundreds of professionals in the fields of sexual health, sexual prevention and therapy. He is one of the sexual health pioneers in Sweden and established sexology as an academic subject.