He GIVES the Inquisitor a safe word, he lays down the terms, he utterly dictates what will or won't happen by giving them two extreme choices - my way or no way. That's not exactly what I'd call a relationship - he's dictating the terms. That personally is what bothers me about the whole "romance".
Er...no, he TELLS the inquisitor how BDSM relationships work (or the Thedas equivalent) and lays down the CONVENTIONS of how these things work.
He doesn't say "My way or no way", he says "I'm into this, this is my sexuality, if you're not into the same stuff then we're not right for each other" - how is that any different from what happens in real life, and how is it unreasonable? Why should bull attempt to change or deny his sexuality?
He's not saying "If you don't like something I'm doing, the relationships over", he's saying "If you don't like something I'm doing, use the safeword and I'll stop doing it" - they're still a couple, he's not suggesting that if she uses the safeword that that's the end of their relationship, he's saying that's an end to whatever he was doing that she doesn't like....
I really am baffled as to why you people have chosen to interpret it in this way - Bull goes well, well out of his way to assure the Inquisitor that when all is said and done, SHE is the one truly in control. I don't know how you could have sat through the same cutscenes as I did and come away with this bizarre, warped version of it.
Without going into too much detail, when I entered a BDSM relationship with someone who was far more experienced then I, we pretty much had the same talk; she told me how it works, explained to me the conventions, told me that no matter what happens I can stop anything at any time, agreed on a safeword, and at no point did I feel she was taking advantage or using me. She also told me that this was what she was into, and that she wasn't willing to live a lie and force herself to live in a vanilla relationship, as she had tried this before and it wasn't for her, and so if I wasn't interested in this it would probably be best to just end the relationship, as it wouldn't be fair on either of us - this is normal, for god's sake (well, normal for people in the BDSM community), so I don't know why you're all working overtime to portray it as something more sinister than it actually is.