From what I've heard & experienced, the SV* (noro or the others) tend to hit in the middle of the night or very early morning. (I haven't had one since I was very young).. but why is this?! It seems that people never get the sudden urge to V* during the day. They're always getting up out of bed to be sick.

Anyone else wondering this, or is it just me? Anyone know why this is the case?