This is only from maybe 3 or 4 examples I have seen , grew up in a small town littered with drug abuse, but pott was the go to choice. But the meth head ladies I came across were always in a relationship with another meth head guy. The girls seemed to always take from the boys stash and just payed him back in whatever couples do. Seemed to me that the man was the meth provider. Only skinny meth head chick i knew was single. Guess while the boys lost their money to the supply  , the girls had money to shop around for food and junk.  Only a guess.  Edit: I never witnessed anything, all but the visuals of appearance came from them talking or other people telling me things.  Don't do drugs kids.