HI All: Athena23 asked, "how to wear a bra without it showing" that is a good question indeed and perhaps only answerable by each CD for herself .
If your size is such that you have a great projection well its not likely to be missed by many people no matter what you try to do to make it less obvious.
For me I wear a camisole or slip under my outer shirt for the same reasons women used to wear them , modesty.
The slip is my fav to wear as it swishes around my legs as I move ( drape it into both pantlegs), and it allows my shirt to slide over my brassiere so that it doesn't
print thru so much and it breaks up the defining outline of bra band and straps .
I also adore LLPGs , but often wear an OBG with stockings with my bra and slip also.
Last of all I too feel the "secret hug" of a well fitting brassiere and it keeps a low grade of arousal all day , I love it .