When you cut out (surgery) or burn out (radiation) the prostate you will no longer produce prostatic fluid (up to 30% of the total ejaculate). There are four sources of "fluids" that are produced during sex. Semen (gone after you have a vasectomy), prostate fluid (gone after you get rid of your prostate), the Cowper's glands (about 5% of the seminal fluid produced before ejaculation to prepare a safe journey for the sperm) and the seminal vesicles (two glands that can produce up to 75% of seminal fluid). During surgery or radiation, the delivery paths for the surviving fluid producers are usually damaged and most will experience dry orgasms or not enough "ejection" material from the prostate to push out the other fluids. During long "sex play" you may experience some clear fluid from the Cowper's glands, which appears before ejaculation, but that may also eventually go away (can take years).