My fiancee has a huge mole on his back...it's about the size of a dime. It's kind of dark in color and looks l?

My fiancee has a huge mole on his back...it's about the size of a dime. It's kind of dark in color and looks like it has got shades of red in it. I don't know if it has changed or not...but it has been there since I've known him which is about 3 years. It has his normal back hair growing through the mole. I heard that melanoma kills hair follicles...? Someone else told me it didn't matter if it was part of their normal body hair? So, would the back hair growing through the mole mean nothing? I'm confused.