Growing up you must have heard of the saying if you swallow a watermelon seed, a watermelon will grow in your belly. This is in fact NOT TRUE. You're welcome, now you can eat watermelons without the fear of ending up looking pregnant. In fact if you gather those seeds and crack em open, the seed kernels are full of protein and taste pretty good.
Watermelon seed oil is apparently great for skin care. Some say it improves elasticity and some say it can reduce acne.