ANY WOMAN'S BLUES
by Erica Jong
Harper & Row; 362 pages; $18.95
In her new novel, Any Woman's Blues, Erica Jong has at last created a heroine even she couldn't love. Leila Sand is blond, randy and famous -- as a painter of "vaginal art." She is fortyish but still, she keeps assuring us, attractive: "I don't look worse than a 22-year-old -- to some men I look better." And like all Jong alter egos, she is looking for love in all the wrong places. The result is the bitter lament of a successful woman sexually obsessed with a much younger...