Teacher gives you hard lesson

So, pupils, when we speak about the reproductive system, we quite often forget to speak about

the practicality of the both organs. While the female vagina has its own practical use,

the man's cock has quite a different story. According to me, it's an all-in-all superior

organ. The female vagina? Well, for example, you can piss while you're standing, you can

wank quite easily, don't you? This simple move can make pleasure to so many men. And