Semen and sperm go down into your stomach, where they are digested with all your other food. If the donor has no STDs, it s perfectly safe. You can safely swallow your own semen. You can t catch a disease from yourself, but can from other people. (Although you can spread your own germs to new, and perhaps more vulnerable, places on your body!) Semen is full of protein, minerals (zinc Calcium), some fructose sugars and other nutrients. It has few calories, and is perfectly safe to swallow if it has no disease germs. from Other people having diseases! You can catch gonorrhea, syphilis, herpes, chlamydia ,aids and genital warts from another person.some are treatable and some not...... having said this it is not advisable to eat semen as you can spread your own germs to new places on your body.......