Both women and butterflies have wonderful, curvy forms. They both have delicate, soft texture and are very pleasing to the eye. The fact that the butterfly tattoo can be any size is also important. You can have a small tattoo on the ankle or hip bone. You can place a larger butterfly on the shoulder or above the breast. Or... you can choose to ink a very large butterfly tattoo in the middle of your lower back. Just about any place on the body will work for such a beautiful tattoo.
One of the main reasons that butterflies make sexy tattoos for women are the choice of colors. You can pretty much ink a butterfly in ANY color. Choose colors to match your eyes, or hair.