If you're female, chances are you've probably been on your period while on a summer vacation at the beach at least once in your life. You've probably also felt a fish or some other sea creature brush by your leg in the murky water, making your brain jump to the worst case scenario: Sharks! Does being on your period mean sharks are more likely to attack you? Here's a great little article that explains why we don't have much evidence on the subject. The good news is that shark attacks are not really that common. Well, compared to the higher chances of car accidents and rip tides killing or hurting you. Besides, did you know that only 3 types of sharks care that much about attacking humans? These are the great white, bull, and tiger sharks. Had enough of shark week and the fear of sharks? Here's a great photo of sharks and humans happily sharing the same waters.