The hairpin probably smells like you and they love that!!! lol
My Pixie is a sneak...Earlier today I was sitting in bed and the pen that I was using ran out of ink while I was writing...I looked everywhere for a new one and finally found one and brought it back to bed. Of course, all the doggies followed me around the house and back to bed. I put the pen down and reached to grab my notebook on my nightstand and the pen was gone. I got up, moved the covers and thought I was going crazy until I realized Pixie was gone...I called her and she did not come so I went out to find her...yep, thelittle booger stole my pen. lol...