Lucifer nearly swats at the block in irritation, which is far kinder than Istredd banging on his own wall the one time Lucifer forced something up between them in order to keep Istredd's raging mind from Lucifer. Of course this being an example means it's nothing at all like that night's had been, but it's still something off-putting. Something that shouldn't be there.

Maybe had it always been like this from the start it wouldn't bother him so much.

"Eh." Peas in a pod we are. Lucifer had all but snarled at him about being the screw up for the bond being the way it was. Screw ups bonded together.