“I only said that wearing chassidishe garb says that this person idendifies himself as belonging to the chassidishe group. DO YOU REALLY NOT UNDERSTAND THE DIFFERENCE????? “
Not necessarily. There was a time when my husband who is NOT chassidish, wanted to wear a bekesheh. He did not identify with any chassidic group, just liked the look. There is a story of a Nazi who hid out amongst chassidim,and they never realized he was not one of them, until he was recognized by one of his victims. (That story may or may not be apocryphal – I have not checked it out).
I would think it is only assur for a man to see his own wife in a bathing suit or go swimming with her if she is a niddah.