Tattoos have always been popular, from the ancient art of body markings to the modern-day art of ink and needles. But in the past few years, a particular type of tattoo has become even more popular than ever before – knife and butterfly tattoos. As the name implies, knife and butterfly tattoos are a combination of a knife and a butterfly, usually done in black and grey shading. This type of tattoo is often seen as a symbol of inner strength and beauty.