Im 1almost 13 years old, and I started puberty last year but I still can't produce pre-cum or cum is that normal?
I was about 14. Enjoy the dry years --- more fun.
Some boys starts to produce sperm when they are 11-12 year, other boys does it 2-3 years later. It is normal. See it this way, today can you masturbate everywhere without a trace, like me when I was 12. I did it while I walked up the stairs to the classroom in third floor. I opened the zipper, pulled out my erect penis and started to masturbate while I walked slowly. I could have walked a lot faster, because I got a dry ejaculation before I came to the second floor. Don't be so busy with become older and more mature, that day will come anyway.