Wearable remote toys

E.g., a partner wears a vibrating love egg or app-controlled vibrator internally, or a vibrating cock ring, while out together in public (or even around the house). The other partner holds the remote/app and can surprise them with vibrations at chosen moments. This can be a fun secret (e.g., at a restaurant one suddenly gasps and tries to keep composure while the other innocently sips water). Set ground rules if in public to keep it discreet and consensual (like only short bursts, and a pre-arranged signal if the wearer really needs it off).