Viagra and watermelon in the same sentence? Could it be that this lovely fruit, a staple of barbeques and picnics, has suddenly taken center stage in the world of romance? According to researchers at the Fruit and Vegetable Improvement Center at Texas A&M University, College Station, the amino acid citrulline, which is found in both the rind and the fruit of watermelon, can relax and dilate blood vessels in a way that is similar to Viagra. [...]