Not getting pregnant without condom. is it possible?

If you are having sex at all you can get pregnant even if the man had a vasectomy there is still a slight chance of pregnancy i knew a boy who was conceived while mom was on the pill and they were using a condom it just happens sometimes but you can reduce your chances with the pill or the shot or an iud. However if you are having sex without a condom get tested often 90% of women think there man will never cheat but over 50% of men do so. There are also std's that can lay dormit or undetected for long times than suddenly cause a problem or be passed to your lover while never harming you.