This is 23-year-old Sarah Marie Summer, who has gone up a reported 18 bra sizes thanks to multiple breast enhancements (yes, it's possible to go up 18 sizes, check out this analysis).
As for where the "naughty" part comes in...we're not really going to go into that too much here, but if you check out her Instagram page, it will explain a lot. Plus, there is the mere fact that seeing boobs that big probably sends a lot of people's minds straight into the gutter.
Sarah's breast enhancements are SO large, they are giving her back problems and have already caused one potentially serious health problem.
"The skin stretched so much I had blisters and they got infected," she told Woman's Day, regarding her last operation. "I was on antibiotics and I was allergic to them. I was really sick. I wasn't healing and they wanted to take them out but thankfully I turned a corner."
Despite that, Sarah has no regrets. She even admits that they make it difficult for her to drive and that they sometimes knock things over with them, but that ridiculously large size is exactly what she was going for.
"I don't think people believe that this is actually how I want to look. I want to look silly and I want to be huge," she explained. "They make people smile and that makes me happy, so that can't be a bad thing."
Well, it can be if you crash your car because your boobs got in the way of the steering wheel. Just sayin'...