In sex therapy, the client's cognitions while engaging in new sexual exercises are:

A) rarely discussed.
B) usually not revealed to the therapist.
C) used as material for discussion in therapy sessions.
D) not evaluated as this may further inhibit the person.

In sex therapy, discussing the client's thoughts, feelings, and beliefs about sexual activities is essential. Therefore, clients' cognitions while engaging in new sexual exercises are used as material for discussion in therapy sessions. This helps the therapist identify negative or dysfunctional beliefs that may be inhibiting the client's sexual performance and satisfaction. Through therapy, clients can learn to identify and challenge their negative thoughts, leading to improved sexual functioning and enjoyment.