It might not be...I used to think the same way but now I'm not sure.
I usually go in the morning but sometimes after a long workout, I feel like another massage usually later in the evening. Normally I wouldn't think about seeing the same girl but when I analyze it further, the girl I already saw in the morning gives one of the better massages, definitely top level service and all at a price that's less expensive than most girls charge for less service. Plus, her attitude is awesome. So for best bang for the buck (no pun intended), I'm thinking I should just see the girl from the morning again...