We found that people in romantic relationships -- whether of long or short duration -- were more likely to have sexted than those who did not have romantic partners. There were no gender differences for engaging in sexting, except that males were more likely than females to have sent a text propositioning sexual activity.
We also found that, generally, dating anxiety from fear of negative evaluation from the romantic partner (basically, worrying about what your partner thinks of you) and having a more secure attachment style (i.e., comfort with intimacy and close relationships) predicted if someone had sent a sexually suggestive photo or video, a picture in underwear or lingerie, a nude photo, or a sexually suggestive text.
We expected to find that anxiety would prompt people to sext but were surprised that comfort with intimacy related to sexting behaviors. We also expected to find that sexting would occur in relationships without a lot of commitment, meaning that we thought that sexting would be part of the wooing.