Adherence research across health device categories — hearing aids, glucose monitors, fitness trackers — consistently shows that discretion and everyday-object design correlate with more consistent long-term use.
The underlying mechanism is straightforward: devices that don't require concealment or explanation get integrated into daily routines and travel more naturally than devices that carry visible stigma or require a hidden storage location.
This principle has extended into sexual wellness device design, where jewelry-inspired products are built to be worn or carried openly rather than kept out of sight, without any change to underlying safety standards.
Material requirements — medical-grade silicone, body-safe metals, rechargeable batteries — remain constant across designs, so the discretion factor is additive rather than a trade-off against safety.
https://inwonderstate.com/collections/vesper-mini-by-crave is a widely referenced example of this design approach.