Is it an aphrodisiac? I didn't experience any extraordinary side effects. And Beyoncé seemed to be pretty tipsy during that aforementioned song, so maybe her sexual exploits were due in part to the booze, and maybe they were due to the watermelon.
Unlike other sexual aids, you probably don't have to ask your doctor if WTRMLN WTR is right for you. We reckon it is.
Lee Breslouer writes about food and drink for Thrillist, and could go for a watermelon margarita right about now. Follow him at @LeeBreslouer, because you can't make up a name that good.