Do condoms work all the time & if they don’t; why is that?

So many things are possible, and some of us have healthy imaginations so although these articles on the subject list many common causes…

https://www.livescience.com/18661-14-common-condom-errors.html
http://www.goaskalice.columbia.edu/answered-questions/common-reasons-condom-failure
https://www.verywell.com/six-reasons-for-condom-failure-2328835

any list won’t cover everything, and several of the reasons are impossible to know about (e.g. was there a defect during manufacturing, transportation or storage?).

I know people who have tried every kind of birth control they could think of, and used multiple weapons at once, and still kept getting pregnant until they got their tubes tied.

Nothing can be expected to work 100%, 100% of the time.

The 2 most common reasons why they fail is that they are not removed properly, and some of the semen gets splashed or spread near the woman’s vagina, and ends up inside.

And the second reason is simply that the condom breaks and allows the semen to enter the woman’s vagina.

There is third reason, and that is that they can come off during sexual intercourse.

If used properly, they are very effective. Most inexperienced people don’t use them properly.

Rubber and other materials have splits in them. They are quite effective for pregnancy, but not perfect—and less so but still fairly effective for viruses which are much smaller than sperm and can get through the splits.

Thank you for all the answers! Wouldn’t people notice, if the condom had a slight tear in them, or if it broke during sex?

No, it can be small and people don’t usually do a thorough examination of them afterwards…

Even a new high quality condom can break while in use. The older the condom the more likely of failure. A freind of mine bought a big box of condoms from Korea. I told him to trash them.

A. Defective
B. Improper installation
C. Damage during usage
D. Improper removal or early removal.
E. Left in package and forgot to install

They are porous, which means there are microscopic gaps.
Almost every solid has a degree of porosity, some are more porous than others.
Condoms reduce the risk of pregnancy and spread of some diseases, but it is only a reduction of risk, not a prevention.
Think of it like a fishing net. Using a net can contain many fish, but some manage to slip through. Also, the longer they are left hanging in that net, the more that manage to wriggle through.
As far as breakage, it can happen, and it is usually not noticed. Why not? Because when a man is at that point of involvement, people could throw darts at them, and they wouldn’t notice.
By the way, not all condoms are latex. Some are made of sheep gut. Those are safer to use when either or both partners are sensitive to latex.

^^ True, not all condoms are latex.

I, myself, am partial to the fishnet variety. They are certainly sexier and kinkier but not as effective I am led to understand.

My experience with breaking condoms is, no. The woman doesn’t really notice since we’re deep into something else. Not sure the man would notice for the same reasons. However, if the woman is dry that can lead to the condom tearing.
Man, I hated those things. That’s one of the reasons I choose my sexual partners carefully. I made sure they like me as a person first, and we had a decent shot at a long term, monogamous relationship, then I got on the pill.

Even in high school, we were told about condoms. Alas, they do not always work. But everything is known in comparison, as Rene Descartes said. If you assume that you climbed to the high-rise and fell and also if you compare if you climbed to the high-rise with insurance and fell again, in the second case you have much more chances to survive.

@ Ewnan- So if someone assumes a condom will keep working, does that mean it will keep working?

What? You don’t keep using the same condom because that one works. And no. Just because one worked there is no guarantee others will work too.
Quit with the casual sex, get into a monogamous relationship and get on a more reliable form of birth control.