Yes it is safe as long as your partner is STD free.
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.
It is not safe.
As long as he has no STD's, it is quite safe to consume semen.
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.
no
Yes. It is safe if they are all free of STDs.
Yes it is safe. I do not advise doing that though. It is safe and you can do so if you wish. You cannot give yourself any infection from taking your own semen. Many males masturbate and swallow their own semen. Recent studies have found that consuming human semen reduces depression. You can find an article about that in the related links below.
Yes
Yes. The amounts that might possibly be found in his semen are at such trace concentrations it won't do a thing.
Buttock mail was created in 1595.
the point of the horse's buttock is under the flank
Buttock fillers are not legal in the US