Would you believe me if I told you each of these drawings was done by ballpoint pen? The detail Spanish artist Juan Francisco Casas puts into each of his sexually charged works makes it seem almost impossible, but apparently it's true. When considering how realistically he renders light, texture and motion, it makes the work that much more impressive. This is the kind of thing you can't help but be inspired by. If Juan can make something so perfect with just a pen, there's no telling what you or I could create using a paintbrush, a trumpet or even our own two hands. Sky's the limit I suppose. Check out more of Casas' work here.