I’ve heard that male would ejaculate when we die. I’m not sure if it’s always so or not.
Also, a hunter told me that when they chase animals, like goats, they will start fucking if they feel really threatened.
What I’ve head is a bit more about males, in humans and animals, but maybe it’s similar for females, too.
Possibly because it will allow them to die in joy ? 
Sado-maso people maybe using this effects to boost their sex drive/sensation/depth of orgasm.
I find females in black to be sexy. 
Other than these, we get spasms during orgasm, both male and female, and it’s a bit similar to the one we may get when we die…although not all people seem to have spasms when they die …
With the waves of spasm and energy running up the spine and shooting the head, it becomes all white in our head.
And it might be similar to what we would get before to die.
Some people loose consciousness soon after orgasm, too.
But these depends on the depth of the orgasm.
Some males may only experience very shallow genital orgasm and they may not feel these, at all.
And not all females get orgasm, not even the shallow one … too bad.
Also, we can get these orgasmic experiences without sex, too.
When I go dentist, without anesthetic injection, I may get strong nerve input (aka pain) and it can become all white in my brain, and I guess I could fade out in a nice feeling if I let it go. But I retain partial awareness to avoid closing my mouth … with the tools and finger of dentist inside.