Butch Hancock, one of Austin’s finest singer-songwriters, grew up in the Texas Panhandle, out among dryland farmers and strict fundamentalist Christians. Butch once told me that he felt he’d been permanently scarred in his vulnerable teen years by the local culture’s puritanical preachings on sexual propriety: “They told us that sex is filthy, obscene, wicked, and beastly– and that we …