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.
In a perfect environment inside a woman's body, your sperm can survive for five days only. Your partner can become pregnant only when the sperm are alive. However, sperm die within the first couple of days inside a woman's body generally. The sperm starts swimming up soon after being deposited into the woman's vagina.