Shane is different. Shane is a bundle of curiosity with a ton of energy to back it up. He's never malicious (except occasionally with his big brothher), but he is very mischievous. Unlike his big brother, he has a hard time remembering, much less following, the rules.
Recently, Shane has had a couple of spankings for not being home on time or calling. That was after a couple of mild restrictions and a few swats. Today, he remembered to call, but your phone was in the other room, so he left a voice mail and came home late. When he pointed that out to you (as soon as he saw 'that spanking look' in your eyes), you checked. You pointed out to him that leaving a message isn't the same as getting permission, so he needs to not do that again.
As soon as you say that, Jason, who's been sitting nearby, doing homework, explodes.
He reminds you that, when he was 'about Shane's age', he got spanked for doing exactly what Shane did today. When he reminds you, you do remember it, though you're pretty sure he was older than Shane is now (though not a lot older).
The honest truth is, for Jason, that was a major violation, but for Shane, it's an improvement. You're trying to think of how best to phrase that, but are distracted by Jason calling you a 'mean old hypocrite," pointing out that you're never fair to him, you always loved Shane better, and that he hates you.
He then knocks his school books off the table, stomps to his room, ignoring your calls to come back, and slams his door hard enough to make some of the art on your wall shake.
Shane is now standing nearby, trying to be Ninja, but mostly succeeding in looking scared.