Creating a Chest Hair Brush
First and foremost, we need to create a Photoshop chest hair brush. And we want it to look kind of realistic, right? Believe it or not, this is actually an incredibly easy step. Go ahead and open Photoshop (and don't worry, this method should work well for everyone using Photoshop from version 7.0 all the way through the current version).
Create a new document, and make it somewhere around 200 pixels by 200 pixels. If your photo is really large, you're going to want to make it bigger, but if your photo is smaller, we can always use Photoshop to make the brush smaller without loss of quality.
Grab your Pen Tool, which is a fairly nifty little tool if you haven't already taken a look at it. The keyboard shortcut for the Pen Tool is P. After you have selected your Pen Tool, tap D on your keyboard, which sets your foreground colors to their defaults - black and white.
Now, start off by clicking one point on your canvas. You should see a small anchor point (a tiny gray box where you clicked).
Click another point like I have done. The goal is to keep them fairly far apart and slightly diagonal from each other. You'll see that these two points have been connected by a very thin gray line. This line is called a path.
Now, click somewhere near the center of your path. A third anchor point will appear, and it will be flanked by small circles on either side.
Holding down the Shift key on your keyboard, drag your center anchor point to create a curve. No need to get too extreme, just a nice, natural curve.
Feel free to grab the other anchor points and create a more or less curved curve, and remember that if you pull on the circle (toggles) surrounding the center anchor point, you can change how gradual your line curves, as well as the angle. Here's an example of one I've done!
Now that we've got the shape of our chest hair defined, let's go ahead and make it a real brush. Press B on your keyboard, and in the brush selection window, grab your default 3 pixel hard edged brush. Here's where it is located on the standard brush menu in CS4.
Now tap F5 on your keyboard, which will open your brushes window. Here's where the magic starts. Simply click on Shape Dynamics. Under Size Jitter, set your control to Fade, and enter 150 in the box directly after it. That's it!
Now tap P on your keyboard to select your Pen Tool again. Right click on your canvas near your selected curve, and select Stroke Path.
Make sure that "Simulate Pressure" is unchecked, and press OK.
Now here's your eerily realistic looking chest hair brush!
To save your brush, simply go to Edit > Define Brush Preset. Make sure you name your brush something like "Chest Hair" so you don't forget what it is!