A very crude way to get your partner or yourself sexually aroused, typically done through explicit text or suggestive photos, at times even nude. Whereas sallying is the same, but better!!!
Lola: omg you'll never guess what happened!! I was sexting with John last night and he sent me a picture of his dick!
Julia: Ew, sexting can be so gross. You should find a good guy who can sally you! it's the same, but even better!