I don't really know awnser for it but come on... a plumber and a princess?
Somehow i don't really get the picture. Its like Mario paid Bowser to kidnapp the princess (behind the scenes) and then act like a hero to impress the princess.
Due to Nintendo's strict policies and censorship Peach and Mario have never been, and will never be a couple. That, and it gives them an excuse to keep recycling the old storyline. Peach gets kidnapped, blah blah. I don't think I could ever live without that.
It's a forbidden love.