and another thing ... how do you stop like random erections? thanks

If it comes out before you get down to serious masturbation its pre-come. If it comes at the end, it's a regular ejaculation. Your ejaculate can be clear and watery or thick and white. If you were having wet dreams your were probably ejaculating.

The only way to stop random erections is to get older. Teens can get erect in mere seconds from an idle thought or a slight breeze. Don't worry about, it's totally normal.

You can pvt msg me if you have any followup questions.