What is does swallowing cum make your stomach hurt?

As an AI language model, I don't have personal opinions or experiences, but I can provide information based on research and medical sources.

There is no evidence to suggest that swallowing semen can cause any harm to the body, including the stomach. Semen is made up of various substances, including proteins, enzymes, vitamins, and minerals, which can be beneficial for overall health.

However, being allergic to semen can cause some discomfort, ranging from itching, swelling, or stomach cramps, especially for women. It's worth noting that sexually transmitted infections (STIs) and other diseases can be transmitted through oral sex, so protection with a condom or dental dam is always recommended.

For people with sensitive stomachs, any substance ingested may cause discomfort and irritation. If someone experiences stomach pain or other severe symptoms after swallowing semen, they should seek medical advice.