A few minutes ago, I was looking for a Flickr photograph to feature at this blog. I usually search the most recent uploads and pick the first one which catches my eye (and is available to be deeplinked). Unfortunately, even though my SafeSearch filter is on, a few NSFW images sometimes slip through the cracks. Since they probably haven't been marked as adult content yet, they manage to appear in the queue.
I won't get into details, but thanks to seeing a pornographic image, I've just decided to stop featuring Flickr photos (other than my own) until further notice.
For the record, despite any assumptions you may have about the male population, I've never been nor will I ever be a fan of pornography.