I've never even been with an escort who seemed even slightly drunk or high on weed. There was a regular from before I joined here who told me she was taking anti anxiety drugs - though that was due to family issues, not as needed for work. In terms of raising eyebrows, only thing I can think of is a WG back in the 90s who told me they'd beaten another girl around the head with a baseball bat for stealing £20. Which seemed a little extreme, especially for such a feminine & gentle seeming lass.
More generally, it's no surprise quite a few use drugs for a break from reality - we don't have to look too far to see folk getting randomly attacked left & right, just for having something to say.
In your case regalsun, my guess was she had an almost opposite motivation. While it can mess you up medium to long term, Charlie can be an experience intensifier, several say they have the best sex of their life while on it. Perhaps she chose you for that bit of thrill seeking as she's the sort to appreciate a man with big feet.