It's a strange phenomenon that in Girl World, cutting yourself down seems to be the most appropriate response for a compliment. Rather than giving a meek yet wholehearted "thank you", we retaliate by using self-depreciating remarks. Through this "experiment", Dove proves that you are more beautiful than you think you are. If in the mirror all you can see is a woman with large pores, aged features, frizzy hair, and so on, don't let such image get into you because someone else sees how lovely you are!
On a different side of note, I really have high respects for Dove because it's one of the rare beauty conglomerates that put so much meaning into their ads. These are the ads which do not shove their products down their target consumers' throats but instead inspire lives. In my previous blog (RIP, Multiply), I even remember musing about Dove's campaign about society's altered concept of beauty.
Did your eyes get misty while watching the whole thing as well? :')