I find the idea of muses really quite fascinating. Perhaps my favourite Muse/Artist relationship is that of Hela Testorf and Andrew Wyeth, which during a course of 15 years he drew and painted almost 250 pictures of her.
Helga was his neighbour and despite this extensive series their sessions were a unbeknown, even to their spouses. When the series became public knowledge Wyeth revealed that their relationship was purely Platonic. Helga is one of the most reviled women in the art world, so whether you abhor or admire her, one cannot deny, she does move you.