Because, frankly, we sometimes take wine much too seriously. (Video courtesy of avguru10 via YouTube.)
Yes, that Thunderbird (which the audience appreciates, too). That's the legendary Texas singer and songwriter Townes Van Zandt performing, and the problems he had with the grape are, sadly, all too obvious on the video.
The video is courtesy of musicloveraustira2 via YouTube. And, for the young people in the audience, talking blues is a style popularized by Woody Guthrie and performed by a list of notable country and folk singers, including Bob Dylan and Johnny Cash. Why is it called talking blues? Watch and find out.