)
I can see that you didn't post it with the intention of it being sexual, I dig. I've written stories and drawn pics I've been told to bump up the rating on -- even with responses afterwards saying it doesn't make sense by users. Most of the time I agree, but it doesn't matter.
You seem a bit defensive and even resentful when people try to talk with you about what's going on, and that in itself can be quite off-putting. I explained, at least from my experience, how the various components could be seen as sexual (not saying I agree with the reasoning, but can still understand the reasoning). Each website has its own set of guidelines and perspectives on how it treats subject matters, some decided by mods/the owner, other democratically (or a mixture). I hope you're able to post and just enjoy yourself going forward, and start to see patterns for what works and doesn't work for content ratings on various websites.
Peace :)