Where do I start of this one?? You MUST ALWAYS wear sunscreen, you are dumb not too. Cloudy days are a must as well, you can still get sun. You shouldn't wear sunscreen on your face with any higher SPF than 15 on a NORMAL day, it can burn your skin. I always mix sunscreen in my lotion, sunscreen that won't clogg pores, that way I have it on my body everyday! You must remember that when doing so it will take the SPF factor down a few notches. There are chemical and physical suncreens out there, so find one that works for you and wear, wear, wear.