Forgiveness And Sins
Your concerns about the undesirable or comparatively minor sins, which are also forbidden by God. Since their intensity is not that grave as that of the major sin, so human beings cannot be that alert about them despite knowing that they are also forbidden by God. Quran calls them Siyyiaat, and has promised us that He will forgive them if we stay away from major sin. This is becuase God knows human beings are not capable of refraining from Siyyaat compeltely. So one should not bother oneslef for commiting minor sins as one should bother oneself for major sins. Decent dressing is always there in every soceity. One should wear decent dresses, not matter if one decent dress of a culture not considered decent in another culture.