If you're under 18 (or below the legal age of majority in your jurisdiction), you should go somewhere else. Might I suggest Wikipedia? You can learn loads of stuff there. Or, alternatively, check out the online version of Strunk & White's Elements of Style. You can get a good jump on your peers in terms of grammar. Of course, if you're anything like I was when I was sub-18, this instruction isn't going to stop you, so in the interest of responsibility, let me say that you should not base your expectations of sex on what you see in porn. Treat your partners with respect, communicate, and always use protection. Now seriously, get out of here.