I was doing laundry, this morning, and I came across a pair of pants in the wash that I know I haven't worn in months.  Then, after thinking about it, I realized that in the past two years, I think I've only worn pants about a dozen times (not including my so so comfortable sleepy pants).  And most of those were moments of professional courtesy.  
My boss knows, and some of the people who've been at the company as long as I have know, but most don't, and we're fine with that.  However, him knowing and accepting doesn't mean that other people will, such as higher level executives.  I know I could sue them if they tried to fire me, but I'd rather not cause that kind of stress in the office.  My boss is a big supporter, and he's helped me out a few times, so if I have to "man up" every once in a while, I can deal with it.  On the bright side, I don't wear heels those days.
One time, however, was actually a personal favor.  My absolute #1 best friend growing up was getting married finally.  He wanted me to attend, but also knew that his dad is an intolerant prick, so he apologetically requested that I try to be more the old me and less the new me.  I was a little hurt that such a close friend would ask me to be someone I'm not anymore, but he is my best friend, and it was his wedding.  Much like in the office, I didn't want to cause any stress, so hand me the ace bandage and cold cream.