Fyodor Dostoyevsky

...things I thought were not needed (David kissing Walter),

If you think it was a gay kiss, I'm sure it wasn't.

First I thought that it was something similar to the 'gay' kiss in Blade Runner (creator-creation kiss), but now I think it has the same role as the Daniels kiss - showing how human David is or would like to be. Sexuality is a way of communication, with the help of it you can try to reach personal goals.

I see what you're saying.

There is just a part of me that gets sucked in to the whole Alien universe and I can just roll with that part.

The other part of me has friends and family who obviously know Alien and love it for what it is, and hated Prometheus...I can just see things like the kissing, and teaching the wind instrument to come off to those people as cheesy and comical..thus the mass appeal of the whole franchise being given a bad reputation.

I see your point... But I think Ridley knew what kind of reactions would be generated by the inclusion of that particular scene. That's why I like him.

I personally didn't care for it at all, but completely understand it's use for audience reaction/plot device.

Given how things went, the metaphor I think would be 'The kiss of death', if so, a nice nod to film noire.

To quote you;
" Also, I still believe in the whole symbolism of the Engineer ships and the dragon eating it's tail. I feel that it puts a good stamp on why all the movies turn out the same. History is doomed to repeat itself, and in the end...I believe that is what Ridley is going to show us....No matter how hard the human race, or any other race for that matter trys to do something...things always turn out the same way and repeat. Not exactly, but in the grand scheme of things it's all the same over and over and over..."

Then there's this from The First Hybrid in BSG: Razor

"All this has happened before and will happen again. Again, again, again, again, again, again, again, again, again."

Then there's this, about Creation, which is poignantly appropriate:

“You know, when we fought the Cylons, we did it to save ourselves from extinction. But we never answered the question “Why?” Why are we as a people worth saving? We still commit murder because of greed and spite, jealousy, and we still visit all of our sins upon our children. We refuse to accept the responsibility for anything that we’ve done, like we did with the Cylons. We decided to play God, create life. And when that life turned against us, we comforted ourselves in the knowledge that it really wasn’t our fault, not really. You cannot play God then wash your hands of the things that you’ve created. Sooner or later, the day comes when you can’t hide from the things that you’ve done anymore.” – Adama

I would say that Fate is a matter of choice...swallow your tail...or spit it out.
But it is all about Choice as below...choice is often the variable in a system...

Head-Six: [walking together through New York City's Times Square 150,000 years later] Commercialism, decadence, technology run amok... remind you of anything?

Head-Baltar: Take your pick: Kobol; Earth - the real Earth, before this one; Caprica before The Fall.

Head-Six: "All of this has happened before..."

Head-Baltar: But the question remains: does all of this have to happen again?

Head-Six: This time, I bet "no."

Head-Baltar: You know, I've never known you to play the optimist. Why the change of heart?

Head-Six: Mathematics. Law of averages. Let a complex system repeat itself long enough, eventually something surprising might occur. That, too, is in God's plan.

Head-Baltar: You know It doesn't like that name.

[she gives him a look]

Head-Baltar: Silly me. Silly, silly me.

Oh so much to write but so little time!

I Love Dostoyevsky.

BZ

food for thought - did David kiss him, or spit an embryo down his throat? DUN DUN DUNNNNNNNN

VERY interesting thought, but Walter .. well, he would've instantly reacted ... 

David and Walter - The Brothers Karazenomov