> Linked lists are conceptual. A node pointing to itself is the most self centered thing I can imagine in computing: an ideal representation of the more vulgar

> Linked lists are conceptual. A node pointing to itself is the most self centered thing I can imagine in computing: an ideal representation of the more vulgar infinite loop. A node pointing to NULL is a metaphor of loneliness. A linked list with tail and head connected, a powerful symbol of a closed cycle. Tongue-in-cheek, but this really made me smile. :-)