need a good love song w/o explicit lyrics?

Okay there is this extra credit thing for my bible class (I go to a private christian school). My teacher said to find a love song that doesn't have explicit lyrics. I don't want any christian crap either. I want a song that is one that my class would love and stuff, because we get to listen to it in class. Also it can't be like a breakup song or anything either, just one about like true love. I've looked through all my songs in my itunes library but can't find any that would fit. I'd be willing to buy another song if someone reccomended it. In case you are wondering what this has to do with bible, its suposed to describe our"relationship"with God and stuff. So anyone have any good love song suggestions for me?? Thanks if you do!!