文档介绍：Beforewe go any further,you shouldknow aboutsomething
that teenagemales experience pretty often: erections. An ERECTION
happenswhen extra blood fills spongy tissues inside the
es larger and firmer, and sticl<s out from the body.(ln
spiteof what somepeople say, there is no bonein the penis.)
When a malehas an erectionit is possiblefor semento leave
the isthe way semenis released through his
happens when muscles allaround his ans contract
severaltimes, pushing the semenout throughthe urethrain a few
littlespurts. At the sametime, he usuallyhas a specialtingly feeling
ASM, and his whole body feels really good. Of course,a
maledoes not ejaculateevery time he hasan erection.(A dropor two
of e out, though.) Whether he ejaculates or not,the
erectionwill graduallygo away.
sperm cells as seen
ejaculation in a microscope
non-erect
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All l<indsof sights,sounds, and thoughts can cause an erection
- evensome that don'tseem to haveanything to do with 's
.',,hyerections can happen at unexpectedtimes and places, lil<e in math
:iassor whilewatching TV, Almost all males have erections off andon
.'rhilethey're asleep, and many wal<e up with anerection, With each
ejaculation,up to a teaspoonof semenis released. 5urprisingly, this
smallamount of fluidcontains an average of 400 millionsperm cells.
lven thoughsemen and e out throughthe sameopening
n the penis,they are entirely different. Urine and semen cannot be
'eleasedat the sametime.
Whenthe penisis fully erect the opening from the bladder
<loses,so no e out. Ejaculationcan be caused in several
, boys have their first ejaculation while they are asleep.
Thisis called a WETDREAM. They may remember having a dream
aboutsex. Other times they won't remember any dream - theremay
,1ustbe a littlespot on thesheet in the might be a Iittle
embarrassing,but mostparents l<now that a wet dreamis normal.