"This will be your dormitory for the year.  To your left are the women's sleeping quarters and the right are the men’s.  In another show of good faith to your age and the unique situation you find yourselves in, we have chosen to not put gender barriers on either of your sides.  Please be courteous of your fellow classmates and should this or anything else become an issue, I will not hesitate to revoke every olive branch I and the staff have extended to you."  McGonagall leveled them all with another rather severe stare.