Sickle-cell disease protects you from malaria
Sickle cell anemia is a genetic condition that is more prevalent in people of African, Indian, and Middle-Eastern descent. It's a recessive trait, but when a person has both copies of the sickle-cell gene, stuff happens. You know what else is prevalent in those areas? Malaria, which kills nearly a million people a year, and affects up to 500 million.
Herpes might protect you from HIV
Synaesthesia connects your senses
As I got older and more involved in the wider world, I found my word/taste associations having an increasing effect in my everyday life, subtly dictating the nature and course of my friendships, personal relationships, my education, my career, where I live, what I wear, what I read, the make and colour of car that I drive. The list is endless.
Tuberculosis makes you pretty
Are you nostalgic for the Victorian era? Do you pine for Mr. Darcy, or envy Jane Eyre? Think nothing is hotter than pale skin, blushing cheeks, and a heaving bosom? Try infecting yourself withtuberculosis.
Pica gives you a career
Food Poisoning makes you look younger
Urbach-Wiethe disease makes you fearless
CIPA makes you pain-free... but dead.
Persistent Sexual Arousal Syndrome... makes you persistently aroused.
Hyperthymesia gives you perfect recall
"Imagine if someone had made videos of you from the time you were a child, following you around all day, day by day, and then combined them all onto one DVD, and you sat in a room and watched that DVD on a machine set to shuffle randomly through all the tracks. There you are as a ten-year-old in your family room watching The Brady Bunch; then you're whisked off to a scene of you at seventeen driving around town with your best friends; and before long you're on the beach during a family vacation when you were three."