If the sperm Doesn't touch the vagina in any way, shape or form then No, you cannot get pregnant.
once it hits the air usually 80% die off.
sperm dies when it hits the air so no
no sperm does not harden it just goes on your bed and it stains unless you wash the sheets :)
yes you can! believe me!
No. Sperm can live for several hours outside the female body depending on the environment.
dried sperm is dead, getting it wet will make the seamen slimy again but the sperm will still be dead.
nothing would happen once the sperm hits air it dies
You cannot get pregnant from stray sperm in swimming pools or stray sperm in general. Sperm is very delicate and can be destroyed by water or sometimes even air, even bacteria in the vagina itself can kill sperm. Unless you use artificial insemination, a penis and a vagina together are necessary to make a baby.
Once it hits air, its (( dead )). It can live inside the body for 5-6 days
I highly doubt she will get pregnant wearing boxers with pre-cum in them. But if you are having sex and use the withdrawl method, well then yes she can become pregnant. Because pre-cum contains live active sperm. Many women have gotten pregnant from pre-cum. But to answer your question about the boxers. I highly doubt it because once the sperm hits the air it usually dies, also if it dries up it looses it's effectivness, So no need to worry.
Air bubbles in sperm aren't harmful at all. The presence of air bubbles in sperm may indicate that the sperm mixed with air on the way out of the penis, or mixed with air shortly after.
There is nothing that you should do when you have found air bubbles in your sperm. If you find blood in your sperm you should consult your doctor.