Btw, something that really confused me when I was younger: "98% effectiveness" doesn't mean a condom works 98% of the time, and 2% of the time you can get pregnant.
It actually means that 98% of people that use a condom never get pregnant, and 2% do (over some amount of time I'm guessing? I'm not sure).
So if a deaf person with eardrums is present, does it make a sound?