Dark chocolate contains an amino acid that has been proven to double sperm and semen volume. It’s also high in antioxidants – enough to rival pomegranates and acai berries. Antioxidants are a great weapon against free radicals, nasty little molecules found in pollution and toxins that are linked to male infertility. But don’t go overboard – putting on weight can cause imbalances in testosterone which could lower your man’s sperm count. A couple of squares a day is plenty.