I have very fair skin (blond hair and pale skin) and when I go out I always wear at least a SPF of 30 or more on my skin. However since I life in South-Africa, I still get tanned - it takes me 4 - 5 days to get a nice golden tan if i apply the sunscreen like I should (I never get red or sore or peel since I make sure that I apply the sunscreen at least every hour and also I never lie in the sun - i just swim a lot). My question is whether this is still dangerous, whether it could still cause my skin to age prematurely or cause cancer?