What happens if you masturbate everyday for 10 years?

You're fine: You'll have a good sense of how your body and mind work, you'll explore a range of thoughts and sensations, and this will help you should you find a relationship with someone special. You will not injure your mind or body. Essentially all teenaged males ; most females enjoy their bodies in this way, often daily. Talk with some sensible, informed adults -- maybe even a parent or your doctor.

10 years older: You're 10 years older than you started. Other than that, you've also had 10 years to get know yourself better. If you've done this to the exclusion of forming relationships, you may want to evaluate your motivation for self fulfillment.