Help me plz?serious problem?!

It will be for one of two reasons, the first is that you may not be ready yet, and the second is that you may not be doing it right.

When you masturbate, do you reach orgasm, which is like a powerful pulsing feeling in your penis, and then lose your erection? If you do, then you aren't producing any sperm yet, but you may get a few drops of a clear, sticky, liquid come out of your penis.

If you aren't getting as far as an orgasm, then you aren't masturbating for long enough.

The best way to learn how to masturbate is this:-
Find somewhere quiet, where you won't be disturbed, lock the door if you need to.
Relax, and take your time - it's not a race.
Get some tissue to clean up, and just start rubbing your penis up and down. If you need any lube, use spit.
Vary the speed until it feels good, then keep going. As you get close to your orgasm, it feel a lot better, and you may have to speed up to reach the end.

It might take a few times for you to get it right, but once you do you'll know.

Take care, and have fun.

Personal experience.

Your still young bro. Not all 13 year olds can yet. In no time you will be able to. Dont sweat it man.

For your other question, I cant tell you why you cant ejaculate. You will when your body is ready. And NOT until then. Oh, and you meant to say semen, not sperm. You cant see sperm bro.

I could ejaculate when I was 12, but everyone gets that at different times. I assure you, you will be able to soon enough.

Yes your normal

it is normal as you are still young