Why do sorority houses have strict rules against boys sleeping over?

[AGDee]

He's probably a troll but it's not a bad question to have answered on a board like this either. Aside from women being comfortable dashing to the restroom in the middle of the night without worrying about running into a stranger, there's also the point of- if it's against the rules for men to be in the house, and you see one, then calling 911 is a good idea because he could be an intruder. IF men are allowed and you see one in the hallway, you're going to assume he's 'with' a sister.