Two uglies make a cute. Sometimes.
This phenomenon exists throughout the animal kingdom, including humankind. The condition can be temporary, as the cute can morph into ugly at any given moment.
I considered posting pictures of family and friends and their offspring to prove the point, but that might be be rude.
Hmmm. Upon further reflection, sometimes I find the reverse is true....two cutes make an ugly. I am thinking of the spawn of one particular couple, but I am sure you can come up with your own examples.