Final answer:
Sexual intimacies with former therapy clients/patients are generally considered unethical and are prohibited according to professional ethical guidelines, due to the potential for exploitation and the power imbalance inherent in the therapeutic relationship.
Step-by-step explanation:
According to professional ethical guidelines, sexual intimacies with former therapy clients/patients are generally prohibited and considered unethical. This stance is reflected in the codes of ethics of major mental health professional organizations, such as the American Psychological Association (APA) and the National Association of Social Workers (NASW). These guidelines specify that entering into a sexual relationship with a former client/patient is fraught with potential for exploitation and harm, regardless of the time that has passed since the therapeutic relationship ended.
The prohibition against sexual relationships with former clients is based on the inherent power imbalance within the therapeutic relationship, which continues to influence the client's vulnerability and trust beyond the formal conclusion of therapy.
Although there are some exceptions noted in very rare circumstances after a significant amount of time has passed (varying by organization guidelines), the general rule strongly discourages such relationships to maintain professionalism and to protect clients from potential harm.