I mean is it possible to swallow sperm and get poisoned? Like you eat damaged food and get sick - feel vomit, wash machine in stomach etc.
If the sperm of a man is tainted by something he was infected with it could be passed through body fluid: a simple cold or the Giardia protozoan which would make one nauseous and sick. In the case of Gulf war syndrome for example... troops came home and out of like 10,000 of them who were tested 51% of their spouses were sick as well. They have also reported a high rate of miscarriages, menstrual and reproductive problems, and burning semen during sexual intercourse. In the case of Agent Orange exposure benefit claims extend through something like 5 generations of the soldiers, their offspring and their spouse.
I'm not so sure about colds, but certainly std can be passed on by swallowing sperm of a diseased person. Instead of asking here, check the below out. http://www.teenwire.com/ask/2002/as-20021121p467-sperm.php
"Honey...I'm a lesbian." "Since when?!?" "Since I learned that I am allergic to sperm. Look its not you, it's your sperm"