There is a special place in hell for google +
there are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
Mr.Xerty aka Brice Chaplet born 1984, is a freelance graphic designer and illustrator actually live in Paris, France. Since 5 years working for several clients like Sony, Caron, Fotolia. His style is influenced by urban life, underground culture and vintage design. He likes to play with photos, textures and colors which are most of the time mixed with some vector shapes.