If there are health benefits to watermelon, I am going to live to be 105. I eat massive amounts of the stuff. I just bought my eleventh watermelon for the season and have eaten nearly every single one of them completely as no one in the house really eats much of it. (and this season I was gone for a month in Sweden were I didn’t buy any because a watermelon there costs $10-15)
My daughter loves them frozen. I take one, clean the outside thoroughly with dilute bleach, slice it into neat wedges and put those in ziploc bags in the freezer. She could probably eat her weight in frozen watermelon.