The continuing growth and development of digital platforms have revolutionized many sectors, one of which is health care. Telehealth or telemedicine services have allowed medical practitioners to connect with patients remotely, a phenomenon that has become increasingly prevalent in the wake of the COVID-19 pandemic. Among these telehealth services, a significantly burgeoning niche is online sex therapy. An examination of this industry reveals a fascinating picture of its trajectory and potential that is both intriguing and insightful.

In the realm of sex therapy, the online medium presents a unique blend of opportunities and challenges. It redefines the therapeutic relationship, introduces new modes of interaction and engagement, and affects the delivery and reception of therapy in ways that traditional face-to-face models do not. The industry's ascendancy is characterized by several key trends and metrics that shed light on the factors propelling its growth and the challenges it faces.

One of the major driving forces behind the rise of online sex therapy is the increasing normalization of discussions regarding sexual health. The cultural taboo surrounding sex and sexuality has been slowly eroding, as society becomes more open to conversations about these topics. This normalizing trend is supported by principles in social psychology, primarily the Spiral of Silence theory. This theory posits that individuals are more likely to voice their opinions if they perceive them to be in line with the majority. As open discussions about sexual health become more prevalent, more people are likely to seek help, hence, the increasing demand for sex therapists.

Simultaneously, the surge in digital literacy and the widespread use of smartphones and high-speed internet have made online platforms a feasible and often, preferred method of receiving therapy. Patients can engage in therapy from the comfort of their homes, reducing stigma and increasing accessibility. This eliminates geographical barriers, making it possible for individuals in rural or remote areas to access therapy.

Online sex therapy also leverages the principles of economies of scale, as therapists are able to cater to a larger volume of clients without the constraints of physical office space. A comparative analysis of the economic efficiency of in-person versus online therapy underlines the cost-effectiveness of the latter model, which has no travel expenses or overhead costs.

However, it is essential to recognize that the online model is not without its drawbacks. The absence of in-person interaction can lead to miscommunication, as therapists are not able to interpret non-verbal cues. Further, technical glitches and privacy concerns can mar the therapeutic experience. Yet, it is a testament to the robustness of this model that despite these challenges, it continues to grow at an impressive pace.

The current regulatory framework guiding online therapy is in its nascent stages and varies widely across jurisdictions. A major issue is licensure laws, which often limit therapists to practicing within the state they are licensed in. This poses challenges for online therapists who may have clients across state lines. A potential solution is the development of standardized national or international licensure laws for online therapy, but this is a complex issue necessitating careful thought and negotiation.

As we extrapolate these trends into the future, the picture that emerges is one of continued growth, albeit with a potential for disruption due to regulatory changes. The challenge for the online sex therapy industry is to continue evolving and adapting in the face of these changes, just as it has done so far.

In conclusion, the online sex therapy industry presents a compelling case study of the ways in which digital platforms can transform traditional service models. As with any disruptive innovation, it challenges us to rethink our preconceived notions and adapt to the new paradigms it introduces. Its trajectory offers valuable insights into the interplay between technology, healthcare, and society, and the ways in which they shape and are shaped by each other. The story of online sex therapy is far from over, and it will be fascinating to see how it unfolds.