Earlier quoted context omitted.
> I remember one classic one is the "no coffee when pregnant", the study says this causes problems, the test was performed on rats and by feeding them coffee in the amount of 3/4 of their body weight. We can agree that with this amount, it's reasonable it could cause problems. Very different from one cup of coffee though. Honestly I don't know which study you're talking about, and I'm not trying to question what you'…
I'm a light sleeper and I feel like I have an awareness of everything nearby when I'm asleep (like I used to fall asleep with an open laptop in bed during college without knocking into it). I have a feeling co-sleeping wouldn't be an issue for me, but with all the dire warnings I'm afraid to risk it.
You absolutely don't have awareness of everything nearby when you're asleep. You are inherently incapable of even determining this because you're sleeping. I'm sure you react to some stimuli but that doesn't mean you can expect yourself to react to every potential stimuli that you would want to.