Dear Welcome to HCM We understand your concerns Your problem is more of a psychological nature. Every animal is attracted towards its opposite sex for sexual inter course. Reproducion is made pleasure because of the intercourse. Your penis is supposed to be erect on the sight / thought of female inner areas. If it is not happening, ther are several problems linked. But in your case this could be due to your anxiety towards sexual activities. Don t try to overdo or ovrthink about sex. Take it as normal human activity and don t give it undue weightage. Consult a psychologist for detailed treatment plean and course. Wish you good future.