Fourth Law of Gender Bending: Characters who have their Gender bent are more attractive than those that haven't.

In case you were wondering what the other laws of gender bending are:

1. Once a male character has become female, circumstances will conspire to keep them female. (This is because most gender bender stories are male-to-female, and if it can be easily undone the writers have no story)

2. Characters who are gender bent will, willingly or not, be forced to adopt traits of their new gender. (This is because the alternative, where people and society at large accept and acknowledge a person's gender identity regardless of the genderbending, results in a story without drama.)

3. Being gender bent will by default involve said character becoming increasingly comfortable with their new gender, unless the genderbending is restricted to a single episode, story arc, or other state of non-status-quo. (This is simply a natural way to show a character adjusting to the new status quo, especially since the other laws will likely be out in force)

4. See Above. (This is done for both dramatic and comedic reasons)

5. If an adolescent to young adult male character is genderbent to a similarly aged female character, they will promptly grope themselves soon after this occurs. (Due to a combination of Disbelief, Perversion, Readjusting to a new self-image, etc)

Note: These rules do not apply to "pure" Rule 63'd characters, Opposite Gender Counterparts, etc.

Yes, there are enough of these kinds of stories for "Rules" to be made.