Hahah! My kitten (now 3) used to do this to me. He was quite adamant about suckling on my shirt. It would get to the point that I would hide under the covers from him because he would just go nuts! Although 3, he still does it from time to time. He was the only survivor of a litter that was WAY underneath my house, so I took over the responsibilities of "Mama Cat," feeding him and helping him use the bathroom.