Russell Brand no longer has the ''instinct'' to protect ex-wife Katy Perry, who he split from in December 2011.
The couple split in December 2011 after 14 months of marriage and though the British comic thinks his former spouse is ''perfect'', he doesn't want to interfere with her new relationship with infamous womaniser John Mayer.
Asked what he thinks of Katy dating a ''better womaniser'' than himself, Russell told Sirius XM DJ Howard Stern: ''You have to let go of the instinct to protect someone once you divorce them.
''So help me God, Howard Stern, I will not compromise my ex-wife's vagina for the sake of ratings. That woman was perfect from top to bottom!''
The 37-year-old comic has been romantically linked with a string of women since splitting from Katy, but insists he is currently single, though he would love to find ''a nice wife''.
He added: ''I'm not dating anybody. Actually, I'd like a romance. Not so much playing the field, just going through life, meditating, doing yoga, concentrating on this TV show and trying to find a nice wife.''
The 'Arthur' star has recently struck up a close friendship with Demi Moore, and though he thinks she is a ''beautiful'' person, he insists there is nothing romantic about their relationship.
He joked: ''I really like her, she's a beautiful person. I've not made love to her yet, Howard, but it's a matter of time.
''That's the sort of thing that'll get in the newspaper.''