Talk to Urologist on No Erection Since Puberty

I recently got nikkahfied with love of my life. My husband told me that he #never got an #erection #not #once in his life. No Morning Erection. He's gonna be 27years old. He do masturbation; also ejaculation happens. But his dick never gets hard. Even though he once made me touch too but still. (No i.c tried and done just touch) Now he is so depressed. Can you tell what could be the possible cause of having NO ERECTION since puberty. We are gonna marry soon, he is not ready to go Doctor alone. He's scared!!! Ask me a detail if needed about him. Cant we have ic without erection? What is the importance? What test should be done? Please answer the query indetail.