MTV reports:

Green Day have covered a lot of topics over the years: politics, war, greed, depression, boredom and the mind-numbing spiral of drug addiction.

But carnal knowledge? Not so much. According to a YouTube video posted by the group chronicling the sessions for their upcoming ninth studio album, that will be remedied in the near future. Of course, Green Day being Green Day, they didn't put it quite as delicately as all that.

"I think it's so personal and it is so voyeuristic," replies singer Billie Joe Armstrong, shown adjusting levels at a mixing board. "And it is ... this is the first time we've ever really sung about f---ing."

And there you (bluntly) have it. Green Day are opening the door to their hearts by singing about the oldest topic there is in rock and roll. The thing, you know, that actually gave rock and roll its name.

A February 14 post from Armstrong strongly signaled that the album would tackle all things carnal. "Happy Valentine's Day!" he tweeted. "Officially started recording the new record today. It's F--- TIME!!!!"

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Muse, meanwhile, look to release their sixth album in October. Gibson reports:

Muse is collaborating with arranger, composer and conductor (and father of Beck) David Campbell, who was responsible for the orchestrations on “Unforgiven III” from Metallica’s Death Magnetic album, as well as work on These Days by Bon Jovi, Fallen by Evanescence and Minutes to Midnight with Linkin Park. Campbell also conducted the Melbourne Symphony Orchestra and wrote the arrangements for KISS Symphony: Alive IV.