I know it's normal to get erections when the doctor begins the genital part of the physical exam. But I've been getting erections all my life whenever I'm told by my male doctor... Yep, Male, to take off my pants and shirt... Every year. I'm 17 now and I have my physical tomorrow for school. I'm afraid I'm going to get an erection yet again... Is this normal? To get an erection at 17 before the genital part of the physical? By a male doctor?