Ha! I have never seen this thread before.
I told smrt once that I know if I am going to be able to have an orgasm because when I close my eyes I will see patterns and colors. Almost like an abstract quilt pattern. It is very cool and if I concentrate on it I can prolong the orgasm and make it last longer.
The problem is, when I began to concentrate on it I tend to stop moving and making noises, which then makes it seem I am not enjoying myself. Guess I need to find a balance.