What would other people think if you use the Pride wallpaper if you are straight? Well, they might think that you are a supportive ally, that you have a great sense of style, or that you are just a fan of rainbows. Or they might think that you are secretly gay, or that you are trying to be trendy, or that you are colorblind. But does it really matter what they think? The only thing that matters is what you think. And if you think that the Pride wallpaper is awesome, then go ahead and use it. It's your phone, your choice, and your expression of yourself.