So... do you think you know a lot about sex?

There is no need to teach an adult about sex because it is intrinsic but to know more about the intricacies involved in it, one has to be taught. There are more ways to learn it properly and hope your forum would serve one among them

 

you can asked this question to your friend

 

It is not so much about what you know, but what you don't know.

 

What if you know it all? ....

 

Then you are in self-denial. Nobody knows everything until they have experienced everything - everything meaning every woman/man in the world.