When I "let my hair down"

I don't know where the phrase "let your hair down" came from but when I "let my hair down" I've been known to:

• Sing while walking down the street for no apparent reason except that I'm happy.
• Dance (only in my apartment but it is fun!)
• Cook something fancy-it's fun to cook especially if it's with others. 
• Have breakfast in bed. There's something really nice about it especially on a Saturday morning. 
• Write for fun. I do spend a lot of time writing for my job, but when I'm home I write for fun, especially in this blog!

If I've learned anything from letting my hair down, I've learned it's nice just to be good to yourself!