How come condoms are not 100% effective?
the penis touches the area around the vagina before a condom is put on. the condom splits or comes off. the condom gets damaged by sharp fingernails or jewellery. you use oil-based lubricants, such as lotion, baby oil or petroleum jelly, with latex or polyisoprene condoms – this damages the condom.
What is the #1 reason why condoms fail?
A common reason for failure is not using a condom every time you have sex. Another common reason for failure is that the condom may break or partially or completely slip off the penis. Condoms slip more often than they break. If you use a lubricant, don't use an oil-based lubricant.
Are condoms 100% effective if they don't break?
How effective are condoms against pregnancy? If you use condoms perfectly every single time you have sex, they're 98% effective at preventing pregnancy.
How do condoms fail without breaking?
Incorrect application. Carefully putting on a condom is crucial. If not unrolled completely or if there is air trapped at the tip, the condom can slip off during intercourse.