A primary function of art and thought is to liberate the individual from the tyranny of his culture in the environmental sense and to permit him to stand beyond it in an autonomy of perception and judgment.
As tempting as it seems to wear tennis shoes with your tux don't do it. I think it looks ridiculous. If you're 14 years old maybe give it a shot. In general don't portray anything that says 'I'm too cool and I don't care.'