Affirmative action for unattractive people would be, practically, quite difficult to implement. Apart from the golden ratios regarding symmetry, the physical features that constitute attractiveness are subjective on the part of the viewer. Standards of what constitute beauty also change, so the risk is that by establishing a precise definition of what constitutes unattractive, the program may someday end up benefiting people who are considered by a majority of the population to be attractive. Additionally, attitude, body language and cleanliness all play a role. As I'm sure everyone has personally experienced, a person's physical appearance can either be elevated or diminished by their demeanor, and a person's demeanor is something that (s)he can change, thereby negating the idea of compensating him/her for it. It's the exact same thing for body language. And in terms of cleanliness--not everyone can be naturally drop-dead gorgeous, but most people would say that the well-groomed but less innately physically attractive person is more attractive than the smelly, greasy-haired specimen of physical perfection.
I suspect that the professor isn't actually interested in implementing an affirmative action program, but is trying to raise awareness of the issue via an affirmative action campaign.