http://blogs.scientificamerican.com/psysociety/2013/04/02/benevolent-sexism/

We do not consider benevolent sexism a good thing, for despite the positive feelings it may indicate for the perceiver, its underpinnings lie in traditional stereotyping and masculine dominance (e.g., the man as the provider and woman as his dependent), and its consequences are often damaging. Benevolent sexism is not necessarily experienced as benevolent by the recipient. For example, a man’s comment to a female coworker on how ‘cute’ she looks, however well-intentioned, may undermine her feelings of being taken seriously as a professional (Glick & Fiske, 1996, p. 491-492).