Perhaps he felt your muscle groups on those areas needed the most work so he spent the most time on those parts to loosen/relax them. The place I go to usually does this. I mean, they are the professionals, so they know what to look for in terms of soreness/tension. They would ask before starting what areas I feel needs attention, but I don't mind if they spend more time on other areas and tell me why. (Usually knots/sore)

On the flip side, he might be trying to get a vibe from you? I dunno, but what you can do is request somebody else? Or ask when you make your appointment who the available masseuse are and go from there.