No, not unless your partner has a disease
No. There are no connections between the digestive system and the reproductive system.
No, the only way for you to get pregnant is for the sperm to enter the vagina.
They are destroyed
No. The reproductive system of a female is separate from the digestive system in every way. You cannot get pregnant from swallowing sperm.
No. The stomach digest the sperm
If it is ingested than it can become harmful to the digestive system, however, if they are walking across a gravel road it is not harmful to them.
is overdose of digestive enzyme harmful to body?
it can harm it very bad
Nothing, your digestive system and reproductive system are completely separate, there's no chance of gettin pregnant. Women might be affected by the diseases if the sperm contains the virus.
No. But ingesting fractured obsidian could be harmful to the digestive system. If in doubt, contact a medical professional.
As long as the magnet is not sharp or too large to fit through your digestive system, no, they are not harmful.
No. Digestive acids will kill the sperm.