Yes
The rifampin in the semen will not cause any problems, but their semen may not be safe to ingest. Rifampin is an antibiotic given for many reasons, including STD's. If the rifampin is being given for an STD then it would not be safe to ingest the semen, not because it has the rifampin in it, but because it may still have infectious particles in it.
If you swallow your own semen, then no, you can't get anything new. It's quite safe. It's fairly safe, too, to swallow someone else's semen.
No. When you swallow the semen, it goes to stomach and digested. Sputum comes from your lungs.
After all there is no harm in swallowing your partners semen.
no good mon
yes
The same as anything else you digest
if you want
There is a medication called rifampin that can cause semen to be orange in color, but it also makes your tears organge, your saliva orange, and your urine orange too. If only your semen is orange, then it is likely you have an STD and need to get it checked out by your doctor.
you can swallow the semen. yes, some people do it because it is a "turn on".
Clearly, yes.
no