Don't send sexually explicit IMs to thirteen- and fourteen-year old girls. Even if they seem like they're into it. And especially if they don't. Otherwise, several years in prison awaits.
As Michael Richardson discovers here.
P.S. - One more thing, on this last day of May. I appreciate the effort, Ninth Circuit and California Court of Appeal. But slow down, my friends. Or at least spread the stuff out. You guys have published more than fifty opinions in the last three days. Even for someone like me, that's a lot of reading. Pace yourself.