mrenaud - first off - that domain was parked over at SEDO before you bought it - and recieved one (1) click in the last 30 days from type-ins/visitors to SEDO.
Remember that type-ins really only apply to the dot.com version of a domain - just means if you type in the name in IE without the extension you will automatically go to that domain - same as with AOL.
For those overture searches make sure to be careful of what you search for - for that phrase without quotes (which is the primary way surfers will type it in) - I get 999 a day searched on Overture last month and 2143 a day on Wordtracker.
Now look at the number of results in Google for that phrase without quotes - 6,380,000 - that gives you an idea of how many pages you have to be better than with your page - not impossible - but I will tell you that in the top 100 I saw Persian Kitty, Greenguy, Tommy and a few other sites that while you could definitely outrank them if you did it right - it may take a little while
I dont want to discourage you, as I know someone that was told they couldnt rank for "sex" and they are doing it now and laughing at the person that told them they couldnt. (no I didnt tell anyone they couldnt LOL)
However, I would start by building up your TGP as you intended, with that phrase as a backbone to the pages - dont get carried away with it so it looks like spam, but just a nice sprinkling of it - and start doing some link trades - by this I DONT mean the traffic trades you will probably do to build quick traffic - I mean good hard link trades (no cgi/pl/etc in a trade script) from reputable sites (these are best obtained by hanging around a board like this)
As you get link backs to your site you will see your rankings increase (although I dont know if you will run into a penalty as the domain has been owned before - depends on what the previous owner did with it) - watch your logs to see how your visitors are finding you - and expand on those phrases, while adding more content pages to the site (archives/category pages etc.)
As you build this site you will see other variations of your keyword develop and you may find that you start ranking for something a little less competitive than the free teen sex phrase - but the funny thing is you may see it bring more surfers your way daily.
Last - dont ever pay anyone to SEO or submit your site to Search engines or adjust your pages as they are all full of shit and are ripping off site owners left and right - just come back here for advice or if you want even bigger horizons we can recommend some free places to find even more info