Except he literally puts up a fuss every time Bull does it and then Bull tells him to can it and continues to keeps doing it despite his protestations.
And he doesn't "love" the rumors, he frets over them. Obsesses over them because he thinks he's dragging the Inquisitor's reputation down by proximity.
I like how people while analyze Bull's characterization to death and find motivations for every little thing he does, but completely ignore Dorian's and the absolute 180 turn Dorian takes around Bull.
Once again, this is all your own personal interpretation of the situation.
Myself, all I saw was playful ribbing of each other. I won't claim to know the innermost feelings of a fictional character's mind better than you do, but having a character who's gotten close to Dorian and romanced him, he is not the type to put up with bull (pun unintended) that truly offends him.
It's why he left home in the first place, after all.
It's why he will immediately leave the Inquisition if you punch him (which is possible even if you're in a romance with him).
If he truly hated it, he'd have a "little side chat" with IB and put an end to it. Having also gotten close to Bull, he would absolutely respect Dorian's concerns.
Oh, wait. This is victim blaming...somehow.
ETA: And yeah, as someone who's heard the entirety of their romance banter, Bull telling Dorian to "can it" is a blatant falsehood.
ETA 2: "Don't top from the bottom" was, to me anyway, another obvious instance of playful ribbing between the two.
Honestly, if some of you folks ever met a married couple I know, if you truly believe in the things you say, you'd be pulling her aside to convince her to divorce immediately (and then be promptly laughed at). Their relationship is strikingly similar to Bull & Dorian's in that one tends to not have a filter while the other sighs and snarks at him in retaliation...and you know what? It's all fun -- nothing abusive about it Maybe just stop and think that that's how a quirky romantic relationship can work and there's no deeper, sinister machinations going on.
ETA 3: And yes, I know them both very well. We've all known each other since junior high (which was longer ago than I care to think about). I will tell you one thing -- any real abuse happens, on either end, and they'd be gone so fast it'd make the other's head spin.