If you're calling sex "da dirty", you're too young. If you have to ask on the internet, you're too young. If you can't drive to the date, you're too young. If you're too young to actually check into a hotel, you're too young.
Also, I'm 40 and I have never known a single person that had sex before the age of 18 (guy or girl) that didn't later say that they regretted not waiting for the right person.