Georgia O'Keefe did some incredible paintings exploiting the erotic, sensual sometimes outright sexual nature of the shapes and forms in nature. In particular she did many close-ups of flowers in particular that exploited the references to the female anatomy. (More on her in the Wiki).
The Iris in detail the way the petals flow and the brilliant beard and the anther take on some very erotic overtones with a little stretch of the imagination.
This image, the Iris Beard started as a photo wherein the raw file was opened, nominal color correction was done then converted to jpeg in CS2. The jpeg image was then opened in Paintshop Pro, disassembled, run through a couple of filters so the colors would maintain their saturation when printed on wet watercolor paper. Yes, wet watercolor paper, not running wet, but damp and dabbed off. This method of printing allows the fine details to blur into the paper and render a much softer final image. One that gives you an impression of sexuality and eroticism in nature.
A detail of the center to give you an idea of the image prior to hitting the wet paper and causing it to blur.