If your doing it for a charity and all the money is going to it, your raising it through your massage technique then good on you, you should be proud of yourself for doing something that will help others, if you feel as though your being 'used', you are, your being used to generate much needed funds its not about you luv, if it makes you feel that uncomfortable you could always say no, but at 2.50 a shout they are getting a bargain (its 25.00 in my hometown) you will make a decent bit of money for the charity and a great sense of satisfaction knowing you did it. lol