Yeah, I feel the same as you I think.

Although in a way i'm not one to judge as I had about 6 years of being very heavily into drugs and about 3 years of treatment to stop, so I find it very strange that it still bothers me if a girl uses drugs..
Even while I was on drugs it was still a rather large turn of for a female to do it.
I'm sure a lot of girls felt the same way about me.. but yeah, I agree with you..
It may have a lot to do with morals that get instilled in you when your younger.. I remember way back when I was 14 and my girlfriend and the time started to smoke.. MAN that gave me one hell of a complex!! Same with drinking... I didn't start drinking until I was 16 and up until then I thought it was grose if a girl drank... Now I don't mind a girl that has a drink every now and then,,, but it's a turn off if they drink a lot and sort of rely on it...
I often feel like, who am I to judge,, but eeh, I can't help how I think...

I'm a huge fan of the "innocent" types though which is probably a big part of it too.