No other words can describe this.
If it's adorable enough, then it doesn't have to make sense.
For example,
anatomically improbable creatures can be perfectly justified in
the right setting.
Care must be taken not to
stretch it too far, lest
Willing Suspension of Disbelief be lost.
Compare
Rule of Glamorous,
Tiny Tropes.
Contrast
Gonk,
Hollywood Homely (where someone isn't supposed to be cute or beautiful, but is),
Informed Attractiveness (where someone is supposed to cute or beautiful, but isn't more than anyone else).
Tropes running on Rule of Cute include:
