Neither myself or my husband have red hair, but both our sons do. I have lost count of the number of complete strangers who have approached us to comment on their hair colour and ask 'where do they get it from?'. I normally respond (through gritted teeth) that it is in both our families, but in my mind is always 'why do I feel obliged to explain?'.
Am I being unreasonable in wanting to tell people that the genetic make-up of my children is none of their business? Why do they feel they have the right to comment? I wouldn't approach someone else with child/ren who had other unusual features and ask why their child/ren looked the way they do.