text messaging
sexting
https://en.wikipedia.org/wiki/Category:Sexting
https://en.wikipedia.org/wiki/Sexting
https://homosaurus.org/terms/sexting
https://www.wikidata.org/wiki/Q510866
Sending, receiving, or forwarding sexually explicit messages, photographs, or images, primarily between mobile phones, of oneself to others. It may also include the use of a computer or any digital device.
message-based sexual interaction