I am not equally offended because I don't feel that the sexualization of men in advertisements is equally offensive. The reason is simple: the sexualization of women comes from a male-fantasy prospective. The sexualization of men also comes from a male-fantasy prospective.
What does offend me are advertisements with the bumbling-husband archetype or similar man-without-a-woman stereotypes.
Edit: I should point out that I do think male sexualization is bad as it can promote poor body image, etc.