57. Sexologists who use material of a sexual nature for educational or therapeutic purposes must comply with the standards of practice and the scientific principles generally recognized in the field. Sexologists must use the material with caution and ensure that(1) the material of a sexual nature is used after the clientele concerned has been assessed with regard to its receptiveness, development stage, age and cognitive capacity, and after the specific objectives have been determined on the educational or therapeutic plane; and
(2) that each client is informed of the material of a sexual nature to be used and of the objectives pursued through its use.