why think?

For some reason, I feel it necessary at times to just think. I don't mean just simply a thought like thinking about what you ate for breakfast but a deep session of just thinking. It seems kind of weird to me I guess mostly because I can't seem to really do anything else or I seem like I am depressed until that huge session of streaming thought is finished.. Maybe it's not just me.. I think everybody has their own "thought sessions" it's just in their own way. This idea especially comes into play when I am trying to write a song or when little blurps of a lyric come to mind, then it just drives me crazy! well anyway that was my thought on thinking.. ha I'm so weird.