Question:
Is it possible to have nightfall while wide awake? Is this what happens to me when I ejaculate because of my loose clothes and am not asleep whatsoever?
Answer:
As you start to fall asleep you enter a state of semi-consciousness that is called hypnagogia. In that state, you can experience lucid dreams (where you are aware that you are dreaming), your muscles can jerk, or you might experience sleep paralysis (where you feel like you can’t move). I suspect that you aren’t actually wide-awake but not fully asleep when you are ejaculating.
The loose clothing isn’t causing the ejaculations but they are not restricting you from having a full erection and during a full erection, the penis becomes more sensitive.