I am having baby #2 at the moment and even though we have a 3 bedroom house, my two boys will be sharing a room once bubs is out of the bassinet in our room. I want one more but my DH is worried about what will happen when the kids are in their teens. I wnt to boarding school so shared space with between 1 and 4 other girls until I was 17. My two brothers shared until the eldest moved out at 19 ( he bought a house) I guess my idea is bedrooms are for sleeping and getting dressed/storing clothes and you don't need much space for that