My boyfriend is defending his PhD thesis next May, and I'm going to brew a celebratory beer for the occasion. He wants a Biere de Garde with red wine soaked oak chips added. He wants to use a heavy, tanniny red wine for the oak chips, because that's the kind of wine he likes. I could see this resulting in some harsh flavors in the beer, so I wanted a second opinion on this before I agree to do this! I know tannins are typically an off-flavor in beer.