If the sperm is fresh yes. If the sperm is old no.
To Be honest Yes it is.
No one. Outer garments were never washed and underwear sometimes was washed. If it was worn by a peasant they did it, but the nobility had a serf do the laundry.
Nothing except they need washed
That someone washed the whites with a red sock or something?
The underwear is pink either because the company that manufactured it chose for it to be pink, or it was originally white and then washed with something red. Or...you had your period.
While Washington waited white washer women washed Washington's white woolen underwear while Washington's washer woman went west.
No ... the hot temperature of the wash water for underwear will kill any living organism. This is why we wash our laundry on a regular basis.
yes, there is a chance you can get pregnant from that
Yes.
No.
Well, Believe it or not, the original purpose of underwear was to act as a barrier for body fluids, so they would not soil your clothing (which back in the day, was not washed very often!) So in fact, if you have urine in your underwear, then it's doing it's job!
Highly unlikely
I'd say the chances are very slim. However, it's not impossible. Sperm doesn't necessarily die within a few minutes once it hits the air. It can actually take a few hours for it to die. Also, I guess this question doesn't specify whether the guy was actually slightly in, because if that's the case, it's still unlikely, but maybe the chances of pregnancy would be very slightly increased, but still doubtful. I'd say for the most part, you shouldn't worry, especially if it was just on your underwear. However, if you're really worrying and maybe it's caused a delay in your menstruation, maybe it'd be more of a relief for you if you got it checked out anyhow.