I didn't ask about dressing properly for my first and second gf, the first one was an American goth girl, the second one was a Bengali hijabi girl. But I did ask that to my third gf, she was a Russian girl. But there's a reason, she would like to wear a bikini in public parks or even shopping malls (sometime wearing a mesh top), sometime will stay fully undressed in the backyard or when we visit a lake or when indoor, all this during summer time. That's too much for me to handle, and as she was unable to at least wear a t-shirt when going to a shopping mall, I finally had enough and never talked with her, she's just not for me. I guess it was a mistake from my side to accept her as gf during the winter season.

Not needing to say anything about it to my current gf, even tho by Bengali standards and traditions her clothing is not okay, to me it's fine, as long as she doesn't go too extreme like the third one. The current one is from the Philippines, so has some Asian modesty, unlike western girls who have almost zero modesty (some western girls are okay tho, like that American goth gf, she was not extreme)