[ He likes the reaction, that he can manage to make Murasakibara get a bit flustered.

So maybe he does play dirty.  Just a little bit.  But he's really just voicing the way he feels, feeling little need to mask that or give any sort of cold shoulder to the single person he wants to be so close to.  If that honesty is playing dirty, then he'll continue it for as long as they're together because he's too fond of Murasakibara to stop now.

He tilts his head back with a soft sigh as he feels the tongue against his skin, one hand sliding up into long hair to slide his fingers through it. ]  I'd get jealous if you started getting confessions.  [ Himuro's fingers curl in purple hair, gently gripping it. ]  I'm sure some people have thought about it, though.  I'm not the only one.