I am 14 3/4 years old.?

I masturbated very early (about 11- ish- before puberty started) and at that point I masturbated a lot- 3/4 times per week. I noticed a steadily decreasing time that I would last before , but I thought nothing of it. Maybe 3/4 of a year after I started (When i was about 12?), I noticed a my semen becoming very thin, so I stopped. Now I masturbate very rarely (Once about every two weeks), But i still notice that i *** very quickly. as in, VERY quickly.What effect does masturbating a lot have on the speed of ejaculation? Does me masturbating early have anything to do with it? Will this effect be long-term? If so, what can I do about it?It should be noting that all those times I masturbated, I tried to reach climax as quickly as possible...