Have you ever heard of anyone actually getting pregnant that way?

So I've read on here that if you have unprotected anal sex and he doesn't cum there is a slight pregnancy risk, if he just put the head in my butt and pulled right out is there still a risk? Also how is there a risk if he doesn't cum?

Or like if the fluid it was in dried up with the sperm still be able to swim if they came into contact with another fluid

So say if there could have been a little bit of it on someone's finger when they fingered you but they may or may not have wiped it off on something would that be viable

Also I was wondering if sperm died when it hits air or if that's a myth

So I've been hearing a lot about precum lately some say it can only pick up sperm from the urethra and some say there is some mixed in with the fluid, my mom has told me it doesn't happen but the girl in my neighborhood was apparently impregnated by it I just want to get some clarification on if the...