Why you should wear sunscreen in the winter

Client Case #1

So many clients I've seen over the years say "I wear sunscreen religiously in summer when it's sunny out, but not if it's cold and overcast". 

Once I had a young woman in her early 20s from Vancouver, Canada who's boyfriend brought her for her first facial.  She was wondering about a new dark and mishapen mole she had show up on her nose that would also scab over and bleed often. She said it had also grown rapidly in the last few months from a tiny speck to a more visible spot(why her boyfriend bought her the facial actually thinking I could get rid of it. 

I legally couldn't tell her outright it was skin cancer since I'm not a physician,