I know exactly what you're talking about dude. I started smoking at 15 all the way to 20, every single day, the first few days it was 3-7 times a day, but the past two or so years it was once at night. I've smoked about 15 times in the past 4 months, and my head is SO much clearer. It does suck when you forget all the time.

If it's true that a pure sativa doesn't do this to you, that's all I will smoke from now on.