Billy Corgan has some harsh words for John Mayer, following the singer/songwriter's quips to Playboy magazine about Jessica Simpson being "sexual napalm."

"As far as it pertains to her. I think for any person who has celebrity to sort of drop rocks at somebody else's feet like that -- there's things you should really just keep your mouths shut on. There's things that should just be left alone," Corgan, who is rumored to be dating Simpson, tells Rolling Stone magazine.

The Smashing Pumpkins frontman believes Mayer is trying to self destruct, telling the publication, "Rather than take a year off or change his musical direction … some part of it is irritating his soul to the point where he's trying to blow it up. Certainly a talented guy, but empathetically, standing on the sidelines, it's hard to watch someone literally burn their career to the ground -- speaking as somebody who's done it."

Simpson recently opened up about ex-boyfriend Mayer's interview on the "Late Show with David Letterman," saying, "Yeah, I mean, normally you would think that somebody you care about would keep those intimate details to himself…," she went on to say. "I mean, it was definitely a compliment, in a way, but I don't really want people to know that about me. That's, you know, I'm like the good girl and then that happens."

Jessica Simpson Calls Billy Corgan a 'Very Dear Friend' Mar 09, 2010 11:35 AM

Jessica Simpson: John Mayer 'Gave Away My Game' Mar 10, 2010 04:36 PM