乜9嘢

轩辕

当时完事的时候,吃事后避孕丸嘛,

Mok

依家d师弟真系。。。。。。。。。。

星期8

居然来迟了
弱弱地问一句
去哪里买怎么买安全套又方便又自然

bond110

Panti

在高潮前由尿道口流出的透明粘性液体应该是前列腺分泌液，其作用只是润滑接触面而已，并非精液，楼主不必过于担心

hanachong

楼上好强大啊。。。。。

maymayanddandan

点解甘搞笑噶~~~~~！！！

visons

强帖留名~~~

rickzhao

一个普通的贴子把牛人都引出来了~~~

要不你们开个性教育版算啦~~~

燕子

吃两片毓婷不就可以了

C-47

居然来迟了
居然来迟了
居然来迟了

猫猫猫

LZ解决咗问题未噶？已经过咗72小时啦喔～～～～要有早有咗啦～～～～～
建议买个验孕棒俾你GF，出事的话就去医院堕胎啦，唔好挂住上网啦，浪费时间～～～～～

小吻

我由第一页睇到呢度~~

发觉大家都好有经验~~佩服~~~

PS：不停地笑~~~

C-47

LS也很有经验

昨天今天明天

很强,

Awaver

那个东西叫Pre-ejaculatory fluid
里面会有一小部分的sperm
有一定的风险会导致怀孕

Pre-ejaculate (also known as pre-ejaculatory fluid or Cowper's fluid, and colloquially as pre-cum) is the clear, colorless, viscous fluid that emits from the urethra of a man's penis when he is sexually aroused.

Many also express concern that pre-ejaculate may contain sperm which can cause pregnancy, using this to argue against the use of coitus interruptus (withdrawal) as a contraceptive method. There have been no large-scale studies of sperm in pre-ejaculate, but some smaller-scale studies suggest that no sperm is present and thus pre-ejaculate is ineffectual at causing pregnancy. It is likely, however, that pre-ejaculate which follows a recent ejaculation will contain sperm, as some ejaculate is always left in the duct after orgasm.

gdut_stu

many professer in this topic

轻水惜寒

原帖由 Awaver 于 2009-2-10 16:50 发表
那个东西叫Pre-ejaculatory fluid
里面会有一小部分的sperm
有一定的风险会导致怀孕

Pre-ejaculate (also known as pre-ejaculatory fluid or Cowper's fluid, and colloquially as pre-cum) is the clear, col ...

是的，当时是这样的

CCTV

欢迎大家收听性情午夜``````有请大宾周教授``