I have been masturbating since 2005. now, whenever i ejaculate semen doesn't squirt from penis it just dribbles. reason? (my urine stream is fine).

You're getting older: Most teenagers are "shooters". As guys get older, the pressures may be less and the muscles may be a little less coordinated. This will have no impact on your ability to be a father. If you're curious about this, you may want to try "edging" with your partner -- staying excited and delaying climax for as long as you can. You may find that you can still "shoot". Best wishes.