Lysol was once sold as a contraceptive douche. I kid you not.
There were directions on the bottle for dilution. Unfortunately, women thought if a little would kill “germs” a lot would kill more. Some were horribly burned.
Well, to a certain extent, any douche would reduce the chances of pregancy somewhat but not enough to be a relaible form of birth control. The acids in cola are not sperm-friendly, but again, it’s not effective enough to be relaible-- after all, all it takes is one sperm to survive.
Women down through the ages have used some very interesting forms of contraception. In ancient Egypt, it appears some women used a sort of vaginal plug made of crocodile dung and honey. Women also have used herbs and plants to varying degress of success.
Two books on this subject which might be of interest are Eve’s Herbs by John M. Riddle and Devices and Desires by Andera Tone. The latter is a highly entertaining read about contraceptive devices and the fight to keep them off the market.
However, ducks have a secret society so that whenever a researcher takes a duck to an echo canyon, another duck cleverly hides on the other sides and produces the echo.
A duck’s quack does echo, it’s just that the quack already sounds like an echo, so you don’t hear it. I don’t know if that makes any sense, but they proved it on an episode of mythbusters and explained it much better.
The legendary B-25 Mitchell bomber of World War II owed its success in large part to a jazz musician. Frank Trumbauer was a star saxophonist in Paul Whiteman’s orchestra and a longtime amateur pilot who left music to take a job as an FAA official. As a test pilot for North American Aviation in the early 1940s, he suggested many of the improvements that made the B-25 a truly effective airplane.