Judge Bans Sex

A judge in Texas ordered a teenage girl not to have sex as part of her sentence.

Is this just judicial showboating? How are they going to prove that one way or another? A chastity belt? Does oral sex count? (Strong precedent that it doesn't.) Does masturbation?

I'm not in favor of the girl having sex but this looks more like the judge was playing to the media than trying to work for justice.