Paul McCartney called into to Howard Stern's SiriusXM show to catch up with the shock-jock and give him the low-down on how he and wife Nancy Shevell are dealing while in self-quarantine. McCartney became a vegetarian with his late-wife Linda McCartney in the early-1970's.

McCartney, who remains rock's most educated and outspoken animal rights crusader, touched upon the atrocities of China's wet market, which has paralyzed the globe by causing the ongoing COVID-19 pandemic: "Whoever's responsible for this is at war with the world -- and itself. It just doesn't make sense at all. Y'know, I understand their problem is gonna be, 'Well, people have done it forever, y'know, and this is the way we do things. . . ' But, they did slavery forever, too, and, y'know, you've gotta change things at some point."

McCartney has a nine-date European tour set to start on May 23rd in Villeneuve D'Ascq, France. Although his performance at England's Glastonbury festival has been scrapped -- to date, "Macca's" spring tour has not been postponed.

AUDIO: HOWARD STERN - PAUL MCCARTNEY ON WET MARKETS