really hard to answer....
if the ad is on MF or RM, as you suggest, it might include "sensual" elements (that word is open to definition)......the masseur may be planning to upsell the client in the middle of the session as things heat up with tantalizing offers of "erotic" elements (yup, open to definition, too!)......or it may be entirely therapeutic with the masseur fully clothed and the client "draped" (towel over the middle)........or, it may be a 30-minute "express" massage done in a chair??.......
of course, the best answer from us is to discreetly and politely ask the masseur....are sensual or erotic elements included in the base rate, how long is the session, is the client required to be draped, is the masseur clothed?????......be professional and don't ask blunt questions about "happy endings" and all that.......some subtle body language from you during the massage and gentle murmurs of pleasure may prod things along.....chemistry, too, you know.....
if that rate is for an hour, that's about average for a legit therapeutic session in a large city and maybe a little high for Texas (for legit).....maybe the masseur doesn't know how to price?.....or is trying to drum up business?......or plans to upsell?......or isn't licensed?.......