I made this up because google couldn't help me. Nothing scientific about it that I know of. Perhaps get to know yourself a bit better.
How well are we at tolerating death/killing in general? What on this list are you comfortable/uncomfortable/neutral with? Does not include homicide or suicide.
1. Not seeing/knowing what you've killed unintentionally (like stepping on an ant)
2. Cutting down, trimming, pruning, weeding, harvesting a plant
3. Swatting an annoying insect, trapping and killing insects
4. Killing germs, cancer cells (anti-biotics, cleansers, radiation,etc.) Body immune system at work
5. Bugs hitting the windshield
6. Pets killing birds, mice, etc.
7. Observing road kill or a dead animal or having your vehicle cause the death of some creature other than a bug
8. Observing predator kill prey (live or on tv, video)
9. Euthanisizing pet
10. Harvesting livestock
11. Setting traps to kill annoying animals (home, backyard invaders)
12. Hunting to kill and eat (wild game)
13. Viewing disaster, war footage, crashes, events where people and other animals are killed
14. Movies, television, stage shows with actors that depict death
15. Pulling the plug on a human to spare further suffering, abortion
16. Observing a dead human body (accident scene, funeral home, battlefield, etc)
17. Watching someone die (like on a hospital bed, at home, etc.)
18. Killing of the enemy/criminal in self defence, by police or in war.
19. Miscarriage
20. Intentionally consuming known carcinogens that can kill living tissue, especially your own
Probably more that I've missed. Even so it makes me realize just how much death is a part of our lives and that there are some aspects of it that I don't like, or might make me squeamish.
I've had the chance to observe #9 a few times but I couldn't do it despite being invited in by the vet. I get upset if I nail a critter with my vehicle (7). Not a woman, but a miscarriage can't be good (19) I've smoked and drank, consumed drugs I shouldn't have even though I knew they could kill me and I'm not proud of it.(20) No longer hunt wild game but I still fish just for sport (12). I don't really think of plants being alive(2).