It might be of interest to note that those are undergoing, or those that have already undergone gender reassignment therapy are not usually regarded as cross-dressers because they are transsexuals, and they would only generally only be considered to be cross dressers if they were to wear clothes normally worn by the gender that was the opposite of the one that they transitioned to.
Another somewhat intriguing tidbit of information is that some male cross-dressers indulge in what is called under-dressing which involves wearing female undergarments under their male clothes, and it's not uncommon for them to carry panties or either items made of silk or satin and their pockets, and to fondle and play with them during board meetings and the like.