 [ Symptoms ] can lithium cause my hair to fall out [ Disease ] you should be ejaculating since you are not and i am assuming that you have never ejaculated in three years during masturbation there could be a problem one possibility is retrograde ejaculation   a condition where the semen is ejaculated backwards into your urinary bladder and not out of your urethra there are other possibilities of course but this cannot be solved on line this may not be an issue that can be solved by a your primary care provider so i suggest that you see a urologist