one of these is unlike the other

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Movie meme.
These are, uh, "doable." There is an internal logic, but it may be a bit too obscure. I have some good hints planned out if such is the case.

1. rainbow / puppy / feelings / burned alive
2. teenage romance / party / beer / arson Donnie Darko carolyn_tribute
3. men in underwear / drugs / rebellion / blood drinking Dune (1984) silverkilroy
4. men in underwear / father son relationship / uncle nephew relationship / spit Dune (2000) silverkilroy
5. strip club / prostitute / one night stand / whiskey Lost In Translation silverkilroy
6. military hospital / breakup / suicide / disco
7. mansion / cemetary / bank / millionaire
8. apple / photo / nudity / billionaire Thomas Crown Affair silverkilroy
9. urination scene / ejaculation scene / male prostitute / summer vacation
10. incestuous desire / father son relationship / single mother / bloody violence Gladiator stephanometra

--
Looks like I was right about the difficulty. So.
1) There is a certain amount of intentional pairing
2) Spare keywords: inflatable doll, split screen, terminal illness

Extremely helpful, right?
I thought so.