Spankings are not ONLY given for dirty undies, but for all kinds of offenses. It's just that he doesn't misbehave all that much anymore, (must be that the spankings HAVE been effective). But in this spanking, he gets ift for something different; being irresponsible and leaving a window open while guests at a friends house, whereby the sprinkler came on outside and came through the window, soaking the bed. He used to get spanked for wetting the bed, but this is a different kind of wet... And the strap and paddle are used liberally on his naughty bottom.