Our youngest kitten, Shadow, we think was taken a little earlier than usual from her mommy (we got her from a friend when she was only 4 weeks old or so). She used to try and find nipples in our other cats to suckle on, but stopped after a while. Now she's doing something similar, but different...to me! At night when I'm sleeping, she comes in and kneads in my hair and purrs her heart out, and sometimes nestles her face in it. It doesn't bother me, it's just interesting. Also, I have observed that she doesn't purr much except when she's in my hair. And the whole night she will sleep on my head. Anyone have any clues why she does this? I'm really just curious.