Marilyn Manson Cupid's Bitch

2/16/2009 11:45 AM PST

Marilyn Manson -- Cupid's Bitch

Even the Anti-Christ Superstar is a sucker for romance ... at least on Valentine's Day.

TMZ caught death-obsessed goth-rocker Marilyn Manson leaving a very lovely -- and very expensive -- V-Day dinner at Nobu with a mystery date Saturday night.

After the meal, the man who took his moniker from a famed murderer, was nothing less than a perfect gentleman -- chivalrously escorting his lady into a waiting ride.

Somewhere, Satan is seriously jealous.