Strange things your pet is attracted to

My dog is attracted to watermelons. I am not sure I really want to know why. We bring them all the time around summer and he wont let us cut it. It's not like he thinks it's a big green ball. Just props it between his front paws and licks it all over, careful not to nick it anywhere. He even sleeps with it and rubs his mug against it like his personal soft toy...