In the eyes of most people, Bowser is a ruthless tyrant who mercilessly takes over multiple kingdoms without remorse, so I don't think he'd be very great romantically.
Koopa Koopa Koopa Koop Koopa Koop Koop Koop Koopa Koop Koopa! (This roughly translates to "I am excited to see the Koopa Festival!" But I only took a duolingo course.