By the sperm and semen seminal plasma composition, in sexual intercourse, masturbation or seminal emission from urethral opening eduction. Semen for white partial alkalescent liquid, out of body for glue shape after cold and liquefaction. The white liquid discharge from urethral mouth is semen? This not exactly. Because there are many cases urethral mouth can let out white liquid, such as urethral drops of white, pyuria are urology or male science clinical common symptoms. Due to the lack of awareness about teenagers, often the case as "a seminal emission". And some people will pyuria as drop white lightly and delay treatment.
When the man received to the opposite sex physical or mental stimulation, urethral mouth out a few drops of clear and often secretion, this is the urethra glands and urethral ball gland secretion, and neither the semen is not the prostatic secretion. Young people in sexual impulse of the liquid secretion, is to let the glans penis wet, so that in sexual intercourse easily when insertion vagina and lubricate effect, so is a physical protection reaction. Although the secretion is not semen, but not completely ruled out the possibility of sperm in small amounts, because in the sexual urge there are few sperm into the pipe by ejaculation urethra. Therefore, the use of in vitro row is pure contraceptive not reliable.
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