Purge Anyone?

*Disclaimer: Please note, the following post is not for the faint of heart. If bodily functions gross you out, stop reading now.*

Ok, so every morning at 6:30AM sharp, my upstairs neighbor, um, purges. Vomits, pukes, spews, throws up: call it what you will, it's grosses me out a little each time. It's fairly loud, so even though it is usually finished within a minute, it creates a lasting impression. I was hearing it last week every so often because my schedule was a complete mess--I was busy writing 15,000 words worth of papers to turn in (which I did last Friday. Yay, freedom!). Today however, it was just loud enough that it actually woke me up. Some alarm clock, ay?

My question is, why does s/he do this? I was discussing it with friends the other night, and the first guess was morning sickness. This is a good possibility, especially since I was hearing a screaming baby at about 8 or 8:30 several mornings after I heard the 'purging'. Perhaps, then, a second one is on the way? But why 6:30 exactly then? Is it just because that's right after she gets up every morning?

The next guess is that this person is bulimic. But, I wonder about this one because: a) they've just gotten up, so what has s/he eaten by 6:30AM to throw up? b) I only hear it once every morning at 6:30AM. Certainly, if this person were bulimic, s/he would be throwing up several times throughout the day.

And the final guess was that it was a chronic binge drinker who was just coming home for the night. I doubt this one strongly because s/he purges at 6:30AM almost on the dot every morning. Drunks don't follow schedules to a T.

And so it seems to me that it is part of this person's daily ritual. Right after s/he wakes up, s/he clears him/herself of any remaining food to start the day afresh. It therefore seems to me that this might be more of a cultural thing. My question, then to anybody who's reading this is: have you ever heard of or experienced a culture that this is part of the daily routine? I've been asking around, and so far people don't know, so I thought I'd throw the question to a wider audience. Personally, I vaguely remember one of the characters in A Fine Balance by Rohinton Mistry (if I remember his name correctly), an excellent book set in India, doing so, so perhaps it's some regional/ethnic tradition in India?

I probably won't ever know the real answer, but trying to figure out why this person purges at 6:30 every morning is driving me crazy! Any help?