Expand Your Biceps

We are going to play around with a photo of a girl with a skinny arm, to basically double her arm width to give her a bulging bicep. The end result will be her arm looking a bit "manly". Start by opening an image of girl preferably with a folding arm.

From filter menu select liquify.
Select bloat tool from the tool bar.

Use bloat tool settings as shown.
Start bloating at the top of the shoulder.
Similarly move downwards the arm and bloat.

Click ok when you are satisfied with the results.