love watermelon as a late night treat.. my dad and i used to do that on late summer nights and watch one of the late shows. esp cold and juicy. great for ya. still do now and again for posterity sake.. and cause i like it :)
Having a bowl of watermelon as a late night snack is not a bad idea. It is a really nice and good for your health. It is better than having something like the fat free frozen yogurt. You can talk to a nutritionist for more advice.