Gratuitous Type No.2 is out now! To celebrate, GT’s friends and contributors have created a series of special “2”-themed photos, drawings, videos and animations—like this latest piece from Mark Pernice, creator of the issue’s centerfold. Mark, principal of the design and illustration studio Matic, has organ-ized all the parts of the body that occur in pairs just for us!

Check out more of Mark’s work here, take a look at all the 2’s (so far) here, and buy issue 2 now.