No- your testicles continually generate fresh sperm.
Sperm can be retrieved from corpses.
Yes. As long as there is sperm pregnancy is possible.
Yes, because not all of it comes out
no
No.
No. No it is not possible for a girl to get food poisoning from swallowing sperm Yes. Yes it is possible to get food poisoning because swallowing sperm will not counteract it.
Plants never evolved to have sperm in order to lose it
once sperm reaches the air it is as good as dead. oxygen dries out sperm. its kinda like a spermicide
Nope
Ejaculation does not cause males to lose weight.
if the orcas are alone yes but if there in a pod than the sperm whale would lose
It would be theoretically possible, though highly unlikely to cause pregnancy.
Yes, it is possible for some sperm to remain in the urethra after ejaculation, even after urination. Urination can help expel some of the sperm, but it may not eliminate all of them completely. Therefore, there is a small chance that sperm could still be present after urination.