Watermelon does contain quite a bit of natural sugar although mostly the watermelon contains more water than it does sugar content.
An average watermelon is around 95% percent of water and only around 5% percent of sugar which is natural so it's a healthy sugar unlike cane sugar.
Watermelon is a very healthy fruit even though it tastes very sweet and seems like it contains lots of sugar it really is pretty low in sugar content.
Watermelon is also very good to eat when you're losing weight because you can eat quite a bit of the watermelon when losing weight and you'll keep the fat off because you won't be consuming too much sugar which leads to fat.
Watermelon makes a great snack or food to eat and is very healthy and has many health benefits besides being pretty low on sugar content.