Where do they go?

So, I had this amazing idea for a post, but I seem to have lost it. Possibly due to the fact that I am slightly drugged from my medicine. I have to wonder, where do my ideas and thoughts go? Sometimes I'll be in the shower and I have an awesome idea for a song or poem or something and by the time I am able to write it down it is lost forever. This happens alot with other things at other times. I imagine my ideas float around into some black hole somewhere and then pop into somebody else's head. Or possibly there is a imp sitting on top of my head sucking up all of my good ideas. I hope if it is an imp, I hope he's reading because I really want some of those ideas back.
I forgot the reason for this post, seriously can not wait until I have to stop taking my medicine. Buh-bye for now, I'm off to find some edible sustances.