Drive less and walk more. Support preservation of the worlds rain forests. Help stop ozone depletion. Avoid aerosol sprays, and make sure your appliances are ozone safe. If a mole is flat, it cant be dangerous.
Most melanomas start out flat and spread peripherally before becoming more bumpy.
If I don't feel anything, I don't have melanoma there. Most melanomas don't give you any symptoms. They can become quite large without bleeding, hurting, or itching. Unless you look for it, you will miss it. I've never had sun on this part of my skin, therefore I don't need to check it.