Don't use Sunscreen
"Sunscreen lotions may not protect against skin cancer, according to a study by British doctors". [BBC] Bodies are quite clever. They usually let you know when something is going wrong. Put your hand in a fire and it hurts - that's a good thing. It says 'don't do that, it'll hurt, dummy'.
If you lie in the sun too long you'll get burnt and it'll hurt - so stay out of the sun, don't just put sunblock on to stop the burning - you're shooting the messenger. You're body is telling you that lying in the sun is not a good thing to do. You'll get burnt and get skin cancer and you'll be sad.
Listen to you're body. Right now mine says 'drink more coffee'.