I highly doubt you have any sort of condition. Have u tried masturbation? Are you still a virgin? Are you aroused when you are trying to ejaculate? alot of things you left out besides the fact that you cant . there could be many reasons but with your short question its hard to tell you really whats going on.

Hey! My ex could never ejaculate from oral sex but he could from masturbation and sex. Maybe you havent masturbated for long enough?? Maybe it takes you awhile to ejaculate?? If this is the case, there will be alot of jealous men out there!!

well masturbation for any period of time hasn't really done much.
i am a virgin, but im pretty sure most ppl my age have at least experienced any kind of ejaculation (precum, etc), even though i am considerably young.

masturbate with baby oil,,,and at the same time with the other hand just fingertips caress and tickle your anal hole,,,that way you will exite the prostate gland and you will have ejaculation guarantee.
do this in private laing down on a bed and the door looked.

I've read that low histamine levels can make it difficult to achieve orgasm. A doctor can check your levels. Histamine is created from Histidine, an amino acid found in proteins.

The muscles in the pelvis, often called the PC muscles, found between the scrotum and anus, or perineum/taint can also affect orgasm. When these muscles are stronger, orgasm are usually stronger. I find that I contract this muscle to achieve orgasm, or even involuntarily when I've gone beyond being able to control ejaculation. There are exercises you can find online showing how to strengthen these muscles. For a little test, you could try masturbating and flex this muscle to bring about orgasm. Sometimes by flexing you feel less sensation, but ejaculation still builds. If you have good feelings, but don't achieve ejaculation try masturbating to those good feelings and then flexing your PC. Tensing your legs straight out as you do so can help as well. To find the PC try flexing the muscle just behind the scrotum. When you go to urinate, cut off the flow with the muscle you would use to stop urinating, that's the PC.


However, I'm sure there are many reasons that I'm not aware of and it's probably best to speak with a doctor and find out if there is a specific reason for you.