Any good advertising networks that allow mature content, but show non-mature ads?

I have an art based website, and I’ve had the toughest time trying to monetize it. The website does allow for mature art pieces (not pornography), but it’s kept under a filter so a user won’t immediately have to see any of it.
I’m looking for an advertising network that will allow a website like mine, but give me non mature advertisements to display. A lot of people come to the site are not looking for anything mature, and showing ads like that right off the bat just doesn’t fit. I’m currently using Project Wonderful, but the rates are extremely low. I have experience with quite a few other advertising networks (on websites that don’t allow mature content) and there has to be a better option out there for this type of website. Thanks for any responses

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