I haven't had a sunburn in 17 years, whereas my wife can burn in the shade. We're in Florida right now, and we decided to try spray-on sunblock. It worked great for her, but it apparently didn't stick to me, because I'm burned. But I didn't just burn normally, I burned in narrow stripes down my shoulders and upper arms, and in random patches on my forearms, the back of my hands, and my feet. WTF?
EDIT: she is my wife. Apparently I never said that.