If sperm enters your mouth, it is usually harmless and will not cause any health concerns. However, there are some potential risks associated with ingesting sperm. Some people may be allergic to the proteins in semen, which can lead to an allergic reaction upon contact or ingestion. In rare cases, swallowing sperm has been linked to throat infections such as gonorrhea or chlamydia due to bacteria present in semen that could potentially enter the body through mucous membranes found in the mouth and throat. Additionally, a person who swallows another’s sperm is also at risk of contracting sexually transmitted infections (STIs) if their partner has one without them knowing it. For example, HIV cannot live outside of the human body for very long so there is little chance of transmitting HIV through this type of exposure; however other STIs can still be passed on even after short periods away from the human body. The bottom line is that while swallowing sperm may not pose serious health risks most of the time, it's best to practice safe sex by using condoms and dental dams during oral sex activities where you come into contact with bodily fluids like semen or vaginal fluid as these can carry infectious diseases which could put your health at risk