[Because you value them and just about any other person's life more than your own. But arguing that doesn't get anywhere. Nor does the spark of a passing thought that while pissed off at him, he found time to finally cross that Rubicon with Blanca; it'll just devolve into another insistence that it really wasn't like that before, and Max won't believe him, and Ash will just have to be right in the end and get his way. So may as well just go with it as if he's already lost that.

He sets the bottle down.]

You should stop blaming yourself for wanting stuff. Him, anything, anyone. M'not mad anymore. I told you to do it. If you manage to want anyone else any which way, you should go for it. I said I'd go get a side piece or whatever, I got your permission, we're "even" now or whatever.

[He stands up again.]

'course you can be pissed. I pissed you off last time, so why the hell would you tell me when it happens again if I'm just gonna make it worse? You said it back then. Y'want me to just be there and have normal meals and whatever. Like nothin' happened. So the smart thing's not to tell me shit happens. Sayin' I wanna know so I can fuck up again, why don't I just ask you to punch yourself in the face?