Again: I really like song lyrics (and other phrases in various contexts, really) that can be interpreted in different ways! Today's lyric:

I'm yours to ruin
don't ask me why

So it's the second line I find most interesting, but let's look at the first line first. Already we're presented with two choices:

1-1) "I'm completely and entirely yours, such that you may even go so far as to ruin me should you wish to do so." This is the "sweeter" read -- there's genuine affection and trust underlying this interpretation. One might even hear in it a quiet plea for the beloved *not* to ruin the singing lover.

1-2) "I'm yours specifically for the purpose of being ruined by you." Pretty self-explanatory, I think, at least in terms of intention? I don't know precisely what "ruin" entails here (could be sex, could be emotional pain, could be a punishing match in Jurassic Park: Warpath), but the singing lover is very much here for and desirous of being ruined by the beloved.

*There is also my initial read, where I interpreted the "to" as "until." As in, I'm yours until (the) Ruin -- that is, the period of dust and desolation that will follow the collapse of civilization, as featured in many a post-apocalyptic property -- so effectively a declaration of enduring devotion. (I think this is not a properly "legitimate" read, though, in that it's unlikely to occur to people who are not me. ^^;)

"Don't ask me why" is more interesting to me.

2-1) "I have no idea why this should be the case, so you shouldn't ask me!" A charming interpretation, I think. Acknowledges that sometimes feelings kinda just happen. One may be able to devise reasons, mind you, but ultimately they may lack explanatory value: some folks just click.

2-2) "I know precisely why this should be the case, and it is information you should not possess." This is potentially my favorite interpretation, because I love the idea of terrible knowledge that should be withheld for the benefit of others. I'm mostly not a believer in the concept for real -- I generally value transparency and reject most reasons for secrecy (context depending) -- which is why I find the concept of benignly withholding knowledge so intriguing (especially when we're not talking about future knowledge that could disrupt timelines and collapse reality or whatever). It also opens up all sorts of possibilities as to the real reason for this devotion: perhaps there really are pretty awful reasons in play that would, if nothing else, bring the mood down to enumerate.

2-3) "You will do this without question." Nope, don't -- no. Do not ask. I have issued a command and you will comply. Shut your mouth. Shut it. This one didn't actually occur to me until much later, but -- as the title of the song is "Break Me Tonight" -- I think it, coupled with (1-2) above, is how we're supposed to receive the lines:

I'm yours specifically for the purpose of being ruined by you.
You will do this without question.

Which seems most in line with "Break Me Tonight," as the title seems largely unambiguously a command for breaking/ruining to happen imminently. But it could also be a promotional song sung by anthropomorphic Kit Kats. Different reads are always possible.

(And fun! XD)