I guess keeping in tradition with Memento Mori (remember that you have to die) which seems a bit grim but in actuality its not really.
Remember to enjoy your life, remember to be kind and live meaningfully. I like many other artists and designers I have always had a fascination with iconography especially and including skulls.
Not everyone loves them and can definitely make any of the things I do without them by request, however will always incorporate my version of them in my artworks and designs. Anyhow, I thought it would be handy to have a collection with all the Skull things since its an option.