hi.i think thats your decision if you wont to do that. i realy dont think you could get to much of enythig by licking...im not saying you cant get it. but it dosent happen that offton.thats whare it comes in at.whos doing it. and who are you doing to.are thay clean.etc. take care.
If the person has an STD, then any sexual activity (involving fluids) with them will have the risk of infecting you with the STD. If the man has no STDs, then his sperm will not cause throat problems. I've never heard of sperm infecting the eye; if the man is carrying a disease, then the disease might infect the eye, but not the sperm themselves. Try looking up STDs and look at how they are transmitted.