How often are your windows open? What about during Winter? or during Summer? Do you open windows to let in fresh air?

Edit: Context behind this question is because my parents always tell me to shut the windows all the way and I kinda feel like I'm suffocating... literally... (it's Winter here)

Like I just struggle to breathe with windows closed...

So I'm just curious, how do y'all not suffocate while trying to keep house warm and spend less on heating?