Is it normal that my step dad spanked me for no reason

So as usual, I received my belt spanking this evening, this time for getting home a little bit late. I have to sneak on here to write whilst my Daddy is busy, if he found out he'd punish me, and if he knew what I was actually talking about I think he'd whip me. When I first commented on here, I did wonder how and if others are punished this way, and I suppose I headed it with the wrong question really. I'm not sure what I should have said. What I is that I actually enjoy the spankings. Also, I have a stepsister, and she is punished much more harshly and regularly than I am. I know that's mainly because I'm daddy's favourite, and she and I don't get on well a lot of the time. If we're fighting, daddy will more often than not ask me what happened, so I can tell him anything really, sometimes I purposely blame her so that I can watch her get punished, which she hates. Well I've had plenty sore bottoms, and I enjoy watching daddy whip her with his belt and hearing her crying and blubbering, serves her right. No doubt this will bring on the comments from the 'troll' police again, but I don't care.