If Butler is correct and gender is always evolving and in flux, then it seems that some of the acts that are happening in the medical world are taking things a bit far.

A doctor at the Children's Hospital Boston has launched a new drug that delays puberty so that children can decide if they want to have a male or
female body. http://wnd.com/index.php?fa=PAGE.view&pageId=62010
Dr. Norman Spack created the drug so that you could alter the body earlier and therefore more successfully, but do twelve year old children really know enough about themselves to be able to make that choice? Dr. Spack also previous acknowledged that only about 20% of children that are gender confused in childhood continue those feelings into adulthood. If gender is always changing... then what happens when medical steps are taken to permanently change or alter the physical appearance of the body.

Another area in which our view of gender has changed is simply in what we find attractive. Fifty years ago- the looks that were favored where more traditionally 'classic' in the idea of males and females. Burt Lancaster has the classic square jaw, strong forehead, and Roman nose, while Grace Kelly is facially much more delicate with higher cheekbones and lower eyebrows. Today in Hollywood, these classic facial features are becoming much more interchangeable- with these male and female facial features being reversed. As our ideals of what make a male male or female female evolve- it would seem our perception and attraction levels to what is 'beautiful' are also changing.