I am 19 years old, always had a weird hairline but it has started moving back slowly since around the time of puberty. My dad lost his hair around 45, his dad always had hair, and my moms dad's hairline slowly moved back his entire life but he never went fully bald. However, I do have a cousin on my mom's side who went bald in college. Also I have always had that split on my left-mid side (top view), it looks like a thinning spot but its always been there.
