MY DD2 is also enthusiastic about my boobs. She's 4 yrs in a couple of weeks time and i weaned her at 2.5 yrs. I'm pretty sick of the touching especially when i'm strapping her or her sister in the car! With DD1 she went through this phase but i managed to distract her to put her hand on a mole i have near my neck which she called 'mummy mole'...instead of down my top. She did that for a while then grew out of needing to touch me all the time. I'm trying the same with DD2 but she's more determined than DD1! She will grow out of it....i know she will!!!