YES THIS IS VERY NORMAL... What you should do, or want to do, is up to you.
I will only try to help you understand him. The fact that he wants to wear womens clothes does NOT make him gay. Let me give you some things to think about, but more importantly research so that you will understand and know the truth of this all.
(1) Go back through history and see who wore what. did men not wear wigs and wear what todays society would not consider feminine ?
(2)A lot of men create womens fashion,would we create something we did not like?
(3)MOST MALES , have tried on womens clothes at some point in their life.
but we are conditioned to me macho , masculine, whatever. so most will never admit to it and are ignorant and scared of it, and dont want no one to know ,because then we are not a man but , a fag, gay , etc, .
(4)Going back to # 1 again did women not commonly only wear dresses, skirts, lace and frilly things , say in the 50s and 60s . But look at today. if pants or for men, and dresses ect. are for women , then why are women dressed in mens clothes. ( pants ,shirts , etc. ) THINK ABOUT IT.
So what is the difference ?
(5) Womens clothes do have a better fit, and usually softer and far more comfortable than ours, thats todays difference
(6) The human brain has a male/ female side sometimes one side will be stronger than the given sex (be it man or women)so a man may have a more femine side or dominant side. and vise/verse
(7)You can research all the above, try just typing in words , such as crossdresser, transexual , etc, do not make a decision with a scared ignorant mind. but with a more knowledge ,and understanding.