 They say that the act of prostitution is not a mutual and equal sex act as it puts the woman in a subordinate position, reducing her to a mere instrument of sexual pleasure for the client.These feminists believe that many clients use the services of prostitutes because they enjoy the "power trip" they derive from the act and the control they have over the woman during the sexual activity.Catharine MacKinnon argues that prostitution "isn't sex only, it’s you do what I say, sex."