CREATE TABLE table_40538 ("Date" TEXT, "Cover model" TEXT, "Centerfold model" TEXT, "Interview subject" TEXT, "20 Questions" TEXT)

When Centerfold model is on 3-04?
SELECT "Centerfold model" FROM table_40538 WHERE "Date" = '3-04'
SELECT "Centerfold model" FROM "table_40538" WHERE "Date" = '3-04'