Used quick mask mode to select and deselect strands of hair ,then showed a cheat to it.Cool.
Quick Mask will allow you to create your own complete mask on a picture or subject or it will allow you to add to a selection made by any of the selection tools.
To activate it you need to click on the Quick Mask tool icon or you can make it active by going to Select>Edit In Quick Mask Mode. When active, select one of your paint tools and paint on the surface of your image, going over the part you want to include in your selection. As you paint on the surface, a colour overlay will show you the area you are covering. This can be changed in the options palette along with the other option of selecting a masked area or a selected area.
You can change the size of your brush by right-clicking on your image and moving the Master Diameter slider to the left or right, depending on if you want a smaller or larger brush.For delicate and detailed work smaller brushes would be used.
Overall by using this tool you can cut out any chosen object and reuse it. another option would be using the Magic Wand tool but it would not be as accurate as the quick mask tool could be.