C'mon, this is the easy stuff
It is inappropriate in almost any setting to write about "sloppy seconds" in a headline. Or in a story. Or in a letter to your mom.
I just saw "MTV Settles for Britney's 'Chaotic' Sloppy Seconds" on Zap2It.com.
Curious, I did a Google News search to see if anyone else has used the phrase. Yep: the Arkansas Democrat-Gazette and CNN/SI had recent references.