Shedding skin? Seriously, snakes and lizards? That's so badass. On a scale of lame to badass, that's super badass. I want to scold you for being the living metaphor of change, but that doesn't deserve scolding, it deserves congratulations.
And as much as humans might want to slither into a new body each month, we can't. That is unless you have really dry skin and the weather's awful, and you don't use lotion, then maybe you can. But on a more serious note, shedding looks very tiresome and painful, two adjectives that a majority of humans are opposed to, and so, you regal reptilians shall continue to reign supreme when it comes to leaving old skin behind you.
(flickr photo Snake skin by KiloEchoRomeoIndia; http://www.flickr.com/photos/panzer73/2892144377/)