Am I Addicted To Karate?

I've noticed two things since I started karate; firstly, six weeks into taking up regular exercise and I look a bit better. I'm not lighter, but less bulgy. It's not just me, the secretaries at work have commented and nothing passes them by. Also a friends husband remarked and that counts as formal bloke recognition of improved physical status. Secondly, I don't want to miss a session. I had aimed to do at least one per week, two ideally, but given work, one would be OK. For the last two weeks I've done three - two on one day, plus extra practice i.e., four hours in a day. This is odd because two months ago I did no exercise at all (excluding sex and walking to the car) - so on one level I'm really pleased I can manage it without vomiting. However, there is dark side. I've colluded to acquire play dates for the younger children when the extra lesson is on and called on my husband to do the childcare while I'm out. This is starting to sound like addictive behavior. I also dislike the long gap between lessons - I'm craving karate. I don't want to go for  a swim or a jog, I just want to do more karate. I do it in the kitchen, while things are cooking. Frankly, I think this is excellent practice since it's damn hard to do karate on a wooden floor in tights and a tight skirt. I'm not sure why it's so addictive to me - perhaps it's the combination of intellectual and physical stimulation, I don't know, but I do enjoy it.