Yes it can and it can cause Brain Damage
Contrary to popular belief, cannabis actually slightly increases your sperm count.
If you put alcohol directly on sperm it will die.
Smoking cigarettes is one thing that can damage sperm production. Stress is another.
No, it won't damage you at all.
if it's sperm + blood your talking about it could be alot of things. - damage to the groin area even slght damage - infection - irritated blood vessel near the seminal ducts that let blood in - worst case prostate cancer
Yes, if the sperm is in the egg, the egg is fertilized.
nothing
Because there is less genetic damage to the cells when they are cold.
If a man practice handjob regularly during his teenage, then his sperm count is reduced to such an extent that he may become sterile.
About 57 oz of beer.
If he deposited sperm in your vagina and you ovulated, you could be pregnant. No sperm, no baby.
It might not be sperm, it could be urine.