Hello, welcome to HCM, Normally 95 % of the semen is fluid which is contributed by the secretions of the seminal vesicle and prostate and remaining 5% is the sperm. Nothing to worry this is a normal secretions. As you masturbate regularly the consistency will come down but the amount os semen ejaculated after each masturbation will be hardly between 2-5 ml. Your performance will remain the same. This will not interfere with your sexual desire and sexual activity, all these are normal phenomenon and you have all the ability to satisfy your partner. Thank you.