People and the 101/1001 list

Last week I've done my '7 days as a lady'  mission (you know I'm kinda tomboy, and one of my points was about wearing girly clothes for a week), and it was a quite big shot in my circle of friends.  Most of them didn't even recognise me in a skirt! Not even my brother! Everybody asked me why I am wearing these clothes and looked at me so strange. I didn't know what to say.

Because I have a list about things I want to do?
Because I felt like this?
Because I want to change?

So I said it is a bet with an old friend at home. I have to wear girly clothes for a week and I win.
Yes.
I lied.

But I suppose this 101/1001 list is a bit personal, it is something I want to tell only to my closest friends. So I had to lie about the clothes. I felt a bit bad because the story about the bet wasn't true, and I couldn't tell them that I'm trying to change and mybe be a bit better person. What do you thing about this thing? Did you tell anyone this list or why do you do things you didn't used to? Am I wrong to think about this list like something personal?