If you don't masturbate, how can I know if I can ejaculate or not?
When a boy is old enough to produce semen, then when his body produces too much to hold, he will have a wet dream to get rid of the excess. In essence you will masturbate in your sleep and you will find result in your pajama's and on your bed sheets. How often this will happen varies greatly from boy to boy. It can happen every few nights, to once a month, or even once a year. For a few boys, they might not have an ejaculation until their first time having sex with their wife, but this is extremely unusual. Generally, if you have erections and are past your growth spurt, you are very likely to be able to ejaculations.