10 Crazy Contraceptives from History

Animal Guts
It's probably no surprise that Giacomo Casanova was a major contributor to contraceptive history. ┬ęGetty Images

Again, let's celebrate Giacomo Casanova's contributions to the advancement of birth control options -- this time, condoms made of animal guts. Sure, condoms fashioned out of animal or fish intestines as well as from linen are thought to have been used as long ago as in ancient Egypt (or even earlier), but it wasn't until the 1700s and Casanova where they were used to prevent pregnancy rather than just to prevent sexually transmitted diseases (or for ceremonial purposes).

More modern rubber condoms wouldn't hit the market until the mid-19th century, after Charles Goodyear discovered a method for vulcanizing rubber in 1839.