The two best buddies in a man’s life are the reason why men fear low-blows, get blue balls, and are able to participate in procreation. The family jewels have often taken a backseat to the most celebrated male organ, the penis, but they do not only keep their “Lil’ Buddy” company, they are halfway responsible for human life. While you may have learned about the importance of testicles in Medical Daily’sWhat Your Testicles Say About Your Health: 4 Ways Size Matters,” the folks over at BuzzFeedBlue share seven oddball facts about “the two amigos” down South.

1. “Testicles” derives from the Latin word “testis,” which means witness. Linguists are unsure why these words share common roots, but one theory states that in Ancient Rome, men had to swear on their testicles in court.

2. Squeezing testicles too tight can cause the body to release a deadly amount of adrenaline.

3. Testicles can almost double in size during sex.

4. The built-up pressure is what causes “blue balls.”

5. Native women from New Brunswick, Canada, used to brew tea with beaver testicles. These women believed it worked as a contraceptive.

6. The first dinosaur fossil to be named was called scrotum humanum. The guy who named it was pretty sure it was a giant's scrotum. It took about 60 years for scientists to classify it as part of a megalosaurus.

7. The largest human scrotum was 132 pounds. Allegedly, former U.S. President Lyndon B. Johnson once special ordered a pair of pants with extra room for his nuts, according to BuzzFeedBlue — a ballsy move, we can agree.

Whether you call them “meatball,” “truffles,” or “jellybeans,” it’s important to pay attention to your testicles to learn about your physical health.