my highschool chemistry teacher told us smoking weed causes estrogen to skyrocket in your body and would make you grow breasts... that's the kind of education we get in public schools
Not directly related to breasts, but I've just heard that weed makes it so your body has a bit of a harder time creating fat deposits or something. I knew a bunch of skinny stoners and I decided never to look into it, because I like having a few of those "heard it from a guy" nuggets left in my life instead of googling it. Medieval grindset on my part