It doesn't have to be Valentine's day or a birthday for you to do something romantic with your partner, and this background wallpaper allows you to celebrate your love at any time. The image features a young cartoon couple sat on a bench gazing at a fantastical scene with fireworks, illuminated palaces and a tranquil lake. It's a little too sickly sweet for my liking but it's well drawn with plenty of attention to detail. Install it on your partners phone while they're not looking and you're sure to raise a swoon.