Get the picture? These are not advertisers who would be thrown by bog forbid... and image of a breast.
1. Those are the advertisers YOU see. They aren't necessarily the advertisers everyone else sees.
2. Google doesn't think in terms of one individual advertiser or one individual publisher. They probably don't even think in terms of 100, because *it doesn't scale* So it wouldn't matter if three or four advertisers were likely to be okay with it, or even twenty or thirty. Statistically, that's insignificant in terms of Google advertisers.
Google is not interested in anything that doesn't scale. Anything.