hi, thanks for writing.. i have understood your concerns.. the leakage of watery thick liquid after erection is not semen, it is pre-ejaculation fluid which comes from prostate gland and it does not contain sperms.. kindly note that.. early discharge of semen during sex and masturbation is common problem now a days..there are behavioral techniques and drugs available to delay the ejaculation. behavioral techniques you have to practice during the sex in which your partner can help you..it is matter of practice when you find the benefits.. drugs are available which causes delay in ejaculation.these are antidepressant drugs.these drugs shud be taken under guidance from the sexologist or psychiatrist.. you shud consult a sexologist and tell your problem and shud undergo sexual counselling. there is no shame in seeking professional help when the problems are bothering you..this anxiety will worsen your condition..so visit.ASAP. i hope this will be helpful to you..best of luck..