I would take my favourite girl up in a hot air balloon, and pay for us both for a 2-hour trip, and whilst up there I would sing to her sweetly : Love Is In the Air; and Up Up and Away; and Come Fly With Me; and, hell, if that wasn't enough to please her, then I would chuck her overboard.
Take them on the Th13teen Rollercoaster ride at Alton Towers and then sing the lyrics to "Don't look down" by Go West.