Boost Your Bedroom Performance: The Natural Solution to Erectile Dysfunction.... Why Watermelon Could Help With Erectile Dysfunction Citrulline naturally occurs in watermelon and it may support better erections watermelon is a natural source of citrulline Citrulline is an amino acid that may support better erections Viagra works by increasing blood flow to the penis allowing a man to more easily get an erection when he is aroused Citrulline may do the same thing although it works in a different way to Viagra. #shorts