OPTION 1: I would just not give him repeat business. Have him wonder why and if he texts you for an appointment, just tell him what things you like changed. I‘m sure there are other masseurs where you are???
OPTION 2: Or, if you have no other choices, just text him and say how much you enjoy his massages esp when working on your “name area here” and ask him if he can give it more attention for the full hour session. When he comes, play some music noting that you selected something 60 minutes long and will enjoy it for the FULL HOUR LONG SESSION. Hopefully he will get the clue. Otherwise, find someone else.