Muses are cat-like creatures who can exist simultaneously in many different dimensions. To be with a Muse will fill you with the inspiration and knowledge of many worlds, and spur you towards creative expression, the highest form of the sentient condition. But be warned: Muses cannot be called on command, nor can they be caged. Muses must choose to come to you of their own unfathomable will, and may choose to ignore you for a period of several years. Although aloof and uncaring, Muses still seem to find enjoyment in fraternizing with humanity, if for no other reason than amusement.

I guess this is as good as it gets. Indirectly inspired by my friend Carolyn. Thank you Kloxboy for the extra space :)