What is your secret passion or interest?

I have a couple of things that I am passionate about, such as drawing, animal rights, and decorating/organizing.

But…I have a secret passion that no one knows about. Mainly because it is a little bit unexpected for me. I secretly can’t get enough of learning new survival techniques. I love knowing that if anything ever happened and I became stranded I could keep myself alive. What do you have an interest/passion for that no one knows about?