I don't know when it happened.
When I was little, I could spin & spin & spin & spin & spin until I just couldn't see straight and thought it was the best thing ever. Now, well, just writing spin that many times made my stomach do a lil' kickflip.
One year spinning like a top was awesome and the next year I went on one spin ride at the fair and was sick for two days. Cruel, cruel inner ear - why have you forsaken me?
Alas, this means no more riding Disney's Mad Tea Party - but watching it is definitely still fun.