I think you might have issues with your host like @SpacePhoenix; mentioned, and more importantly, you might get demoted on the search engines (sorry Linda), as your results would be hidden from safety filters.
I think if you really must show these images, it would be better to have a completely different site, one geared for the adult market. Be sure not to give it the same domain name, mention your company, but do not make it obvious for Google to group your site as an adult website. When you link to this website from your existing website, ensure that you have a no follow link in their (so you don't get demoted by Google), and have a strong disclaimer, informing the clients that the new website will contain strong images.
Prior to actually linked your site submit your mature website to K9 web protection and other web filters, to actively increase the safety for children. I am sure there are some cool tattoes in the marketplace, but I am sure that no parent would want their children to watch these kind of images.