Sorry that I'm starting another sex-related thread, but I've got a serious specific question that has been on my mind for a long time.
How do you make sure that a condom doesn't slip off, break or otherwise fail? What are the protips or extra safety measures to ensure that a condom doesn't fuck you over?
I am terribly, horribly paranoid of making a girl pregnant or causing her distress or insecurity, and looking forward to hearing whatever could make me more safe or confident.
Make sure things are well lubricated, as this prevents the condom from ripping.
If you use a lubricant, be sure it's water based; silicone based lubes degrade the latex in condoms.
Check the expiry date frequently, and before you buy them.
Don't skimp on brand. Buy Trojan or similar brand.
Buy the correct size. Condoms that are too loose pose the risk of falling off, or fluid exchange. Durex is known to be good for smaller dudes, and magnum for vice versa.
Don't keep them in your wallet or car! Risk of perforation, etc etc. Condoms should be stored in a cool, dry place; in a nightstand is perfect.
Hope this helps! as long as you use and store them properly, most are electronically tested for effectiveness. :)