Symptoms of premature ejactulation include:
-persistent or recurrent ejaculation with minimal sexual stimulation. You must however take into account ones age, excitment phase, "novelty of the situation," and recent frequency of sexual stimulation.
-this disturbance also tends to caused marked distress or interpersonal difficulties.
Premature ejaculation, however, really is only ejaculating quickly during penetration, not during masturbation.
If your under or around age 22, you probably aren't really suffering from premature ejaculation. But there are a number of things you can do to extend your level of excitment before ejaculating. You might want to try the stop and go method, implemented when masturbating. Jack off until just before the point of no return, and stop (masturbating) completely. Don't apply any stimulation until you have calmed down. When you have calmed down a bit, continue again bringing to yourself to the same point but don't yet climax. Repeat this several times before cumming. You can also try kegels.
Http://guys.Clitical.Com/male-kegels.Php http://www.Themarriagebed.Com/pages/biolog
y/male/male-kegels.Shtml http://www.Sex-project.Com/kegels.Shtml both of these teqniques will help you better to know and control your orgasms and both with time, will allow you to cum, whenever you want.