Opioids are derivatives of morphine, a narcotic pain reliever. The term opioid generally refers to morphine and other opium poppy-based medications. Opioids work by decreasing pain signals being transmitted through the nervous system, which suppresses our perception of pain.
When you swallow semen, Semen and sperm go down into your stomach, where they are digested with all your other food. There is no passage connecting your stomach to your ovaries. You can not get pregnant from swallowing sperm. If the donor has no STDs, it is perfectly safe.
Re: death of sperm. No matter where sperm is it can get you pregnant... Air doesnt do anything for it. it still stays there. If sperm is introduced anywhere near the vagina you can get her pregnant. So my advice would be either wash your hands after you get stuff on them or wear a condom from the get go. Sperm dies anywhere between 2-4or5 days after it is introduced outside of the body.