No, 3 million electric toothbrushes were not used in a DDoS attack::A widely reported story that 3 million electric toothbrushes were hacked with malware to conduct distributed denial of service (DDoS) attacks is likely a hypothetical scenario instead of an actual attack.
They have IoT fleshlights and dildos. They are marketed towards remote couples and remote sex workers though (audience interaction I think)
The field is called Teledildonics !