My dad told me that all babies born were little girls - but some would turn into little boys when they sat on a big rock down by the river. (I had 2 sisters and no brothers.) He had a picture of the rock with a little girl on it and then the other picture with him on it.
Oh and if you eat burnt toast it would put hair on your chest. (Needless to say, I never ate the toast if it was burnt in any way.)