I hate it when there's the slightest hints that sexual orientation was determined in any w...

And this is why: http://www.pandys.org/articles/abuseandhomosexuality.html

You know there are real life cases where such happens? What's wrong is to say that their orientation is any less valid than that of someone who didn't experience trauma.

That assumption is outdated and if you read yaoi, rare to occur in plots. So there's no reason to get upset when, like I said, it does happen.

What's wrong is to imply the abuse was what decided their sexual orientation... Like I said, this explains it better: http://www.pandys.org/articles/abuseandhomosexuality.html