Well, I already mentioned my pacifistic attitude in another thread, so I can only state that I can't imagine how killing someone would bring you closer to the woman of your heart. And if she'd appreciate that, she must be pure evil...

*hisssss*  Indeed!


Love is a curse... it´s on me... I would kill everybody for the one women I love...


Homer: "I did it for you, Marge.  I'd kill for you.  Please ask me to kill for you..."

Fulbert

That's the spirit!
It seems that violent selfish lazy guys  are describing their deep fantasies, which they know shivering women will refuse anyway. I suppose the only couple in "The Simpsons", who could promise that for serious - Sideshow Bob and Francesca. Other cases just for get her "awww" and then get her. Of course, Lisa wouldn't appreciate that. But many women in Springfield are lonely and any signs of adoration will be great for them, even that silly words In Marge's case it's different reason - this promise is needed for Homer, not Marge. He wants to hear "Oh, Hommie, I love you even when you're fat, lazy and stupid, and I will be with you and I need no proves".  And he uses it (or sometimes he does some weird things). Remember that school orchestra in her closet - she was so impressed by... ahem... I don't know how to call his behaviour, but I feel sorry for poor kids.
Also, when Lisa fall in love with Nelson. At first she was impressed by his person. Although, later even his song about dead teacher make her angry. But with Colin, she was so much in love, that I suppose if he promised her to kill some bad guys, she wouldn't be angry, only would listen to this as to meaningless romantic bullshit.
So, you'll never know how would any girl, even the smartest one, respond to that.

But killing means you're "ready" to do thing, you can't change later. And I suppose the thing is - if you're "ready" to do something, that changes you and that you can't cancel later, that's really a high price to pay for woman's attention. So, such things sounds romantic, you know, although I doubt I want to hear about killings for me

Fulbert
There are too many people already who do good deeds for free. We call them... Heroes If you want to attract your girl's attention on the background of all that endless heroism, you have to think of something original but all those are just sayings, I believe. Noone would kill a child for the sake of love, unless he's insane. Murderers are always being driven by hate, not love. So those are just fervent words IMHO.

Shortly said, i don't think love is worth killing, and all those things that can be read/seen in movies are deeply exagerated imho. People love to hear or read such impervious romantic words in fables and stories of drama and tragedy, but let's face it... in the real world, love assumes a lot of rational sides to it... i don't think i would say "i'd kill for you". It would be just saying in easy words what can be so difficult to do with actions.
On this note, i'm translating (the rhymes are lost, sorry) and posting a beautiful italian song.... i think it fits this theme a lot.


I won't climb mountains for you
And i won't walk accross deserts:
And there are little chances
That i'd swim through oceans, only to see you...
I won't light up a city
I won't write your name in the sky,
I won't take down any star for you...
For you I won't fight neither dragons,
neither windimills, or hell's demons...
no, i won't do anything of this for you.

For you i'll sell myself,
For you i'll be a baffoon,
I will take the blame
even though i'm in the right.
i'll hang up my violin
to a star that only you know
So that only you,
only you will play it;
I'll be your lady girl,
dressed in pink velvet,
ancient like a painting
pretty, high, a lil strungup
The sparrow that by evenings
dances on your knees
I will be the hero of the dreams
that no one dreamt yet.

Because for you i'll fight
an army of idraulics
neighbours, dentists, idiots, store clerks,
i'll cover myself in boredom's wounds
the ones that no one sees
and that never bleed,
for you.. for you...
For you i will tell lies
swearing on my mother's grave
and i will clean windshields
at the corners of the street;
i will rip out my wings
and rent them to a store,
because flying alone
was always just an illusion.

CargoOfDarkness
But what if one of those people you kill, would be Crazy Cat Lady? Much more kittens will die this way...

Hahaha guys, I would not recommend using that line on a girl. 
I would never do this, except in an emergency of course.  Even then, I'd hope I wouldn't kill anyone.