Thank you for the question, but I wont be accepting more pick-up related question unless their directly relate to sexually arousing a woman.
But I'll answer this one anyway, because my readers are awesome.
First of all, if you want young, simple-minded "hot girls":
Shirtless pics (only if you have visible abs)
Pictures of you partying with hotties
Picture with a cool musical instrument like a guitar
Add in sexual humor to your profile but nothing too clever and you'll get some hot girls messaging you a bit. But it all depends on how many messages you send out and how big your city is. But I might be wrong here..
Why dont you take a look at a study done by OkCupid here: http://blog.okcupid.com/index.php/the-4-big-myths-of-profile-pictures/
If you have something to offer yourself (I'm not talking about superficial things) and look for women, use honesty and humor.
Use the correct spelling (no "ur", "r" and so on)
Avoid physical compliments (you'll come out as an insecure dick)
Be fun (say "How's it going" instead of "Hi" for example)
Be a vegetarian who likes zombies and plays in a metal band