[Even if she lacks the knack for sarcasm, he still finds what she says amusing, at least at first. That bluntness doesn't bother him, after all, he's blunt himself!]

Like I said, it ain't that simple.

[He's not denying the bullying of elementary schoolchildren...]

...There's a lot to explain for you to even start to understand. [His expression falls to something a little more solemn.] And even then, I dunno if you would.