You might also want to include a phrase such as 'non-erotic' or non-sexual' in your meta tag description, such as:
<meta name="description" content="yada, yada, yada, non-sexual, non-erotic, male therapist, male, yada, yada, yada.">
You get the idea.
Also, the suggestion from Brian to include the specifics somewhere on your site (i.e., FAQ) is a good idea. Additionally, the more information you have on your site, the more likely the searcher will realize that it is a legit massage.