My DD is almost three, she self weaned at about 20 months when I was pregnant. She is very obsessed with my boobs, if she is sat on me wants hand down my top, if laying together needs to touch them. Just recently she has wanted occasional feed while her brother is, which is ok with me if at home. In terms of the touching I am now telling her no more if we are not at home, and now only at specific times as am fed up of her stretching my tops. It is a habit thing she often isn't really aware she is doing it her thumb goes in and other hand reaches for boob - she was even trying to do it to my mum the other day! Specific times like before sleeping or if really upset I don't mind as just touching works wonders for settling but not everytime she is near me.