A non-hormonal, reversible and non-toxic male birth control could be a step closer, with scientists successfully targeting a protein that's crucial in making fertile sperm. Knocking this protein out for a period of time would give men control over their protection window, much like oral…
They’re 100% effective, the only reason there said to be 99% effective is to prevent lawsuits from people using then incorrectly.
I’m a human, I can make mistakes in the heat of the moment. I’ve had friend couples I know get pregnant even though they’re “professional condom putters onners”.
It’s not the condom’s fault if you make a mistake. Condom material doesn’t let sperm through, it’s that simple, it’s been used incorrectly if it did. Companies don’t want to lose time and money with lawsuits hence 99%.
Also, anecdotal evidence while you weren’t in bed with them isn’t much of a proof, it’s as valid as me telling you I’ve never got any girl pregnant even when we weren’t using any protection therefore pulling out is 100% effective.