does anyone know why we faint at the sight of blood?
is there some kind of biological / primitive survival explanation? seems to me like the least useful thing you could do when bleeding to death is be unconscious
(ladyintheradiator, Mon 11 Aug 2008, 1:14, 4 replies)

That's rather scientific of you
As for me, I felt faint reading the qotw answers while actual blood doesn't bother me. I would like to know why as well.
(TheWonderfulWombat It came to me in a dream., Mon 11 Aug 2008, 3:59, closed)

Slow your heartbeat?
Don't rightly know, but I assume you'd bleed less if you aren't running about.
(Sock Drawer Demon, Mon 11 Aug 2008, 5:22, closed)

Human 'Cleanliness' Nature
You pass out so that all mess and gore is contained within the single space opposed to one panic-strickenly-spraying and/or splattering your platelet-gravy around the room and faces of the nearby elderly/children.

Clever really.
( the dalai farmer always likes tea, but especially on, Mon 11 Aug 2008, 11:33, closed)

^I'm with Sock
If you faint/pass out then your body can slow your heartbeat and draw the blood from the extremities to your organs.

Of course this backfires if you cut yourself whilst crossing a railway line.
( TGB checking Off Topic is still shit at, Tue 12 Aug 2008, 10:13, closed)