George Strait has a reputation of being a fine, upstanding gentleman and representative of old-school country music values. It’s so earnestly trumpeted that you wonder if it’s not a big come-on. (After all, George Burns once said if you can fake sincerity, you’ve got it made.) In 1992 he (Strait, not Burns) donned a fake ponytail and fake stubble to do “Pure Country,” about a burned-out Nashville star who rebels against the smoke and laser shows of modern, arena-style concerts. Earnest hijinks ensue. By the way, 1992 was the same year “Achy Breaky Heart” was the No. 1 country song.