Do you sleep with the window open?

[Beowulf]

Only in summer

[Brás Garcia de Mascarenhas]

No, I am the kind of person who likes to sleep with everything closed, windows, blinds and curtains. I need complete darkness as any shaft of light bothers me.

[PlattitüdenPaule]

Pretty much all year round, except when its more than lets say 18°C at night.

[CordedWhelp]

I like the idea "romantically" of sleeping with the window open, but I'm far too paranoid to do it in practice. Nah.

[calxpal]

Never, I need everything closed when I sleep.

[zyungh]

Some of the time, mostly during summer

[Smaug]

Never, I prefer to sleep in total darkness and silence.

[Jankec]

In summer

[retfala]

most of the time. I like to leave it half-opened

[~Elizabeth~]

I keep my bedroom window locked at all times because I'm at ground level.

When I lived in a third floor apartment I almost always had my windows open, even in winter.