I remember a waitress I met one night. Beautiful girl. We hooked up a short time later. Anyway, fast forward.
It's been a couple or 3 yrs and I'm doing some community service at a rehabilitation center for mostly old folk. I'd been trying to hook up with this fine latina receptionist and this nasty, rotted tooth, just worn out looking bitch comes up and starts going on about knowing me and eventually hooking up with me, etc! Well, found out it's the waitress and she'd been doing meth. Couldn't believe the affect it had on her physically. I was freakin embarassed and had to explain later to the latina girl about how she had changed. She must've believed me as I hit that and it was great.
I've seen it in some others I've lived around in both nice and bad neighborhoods. It really does just seem to rot the body. Imagine turning into a zombie really slowly. Well, maybe not all that slow.