My 22 month old still nurses frequently, day and night, which I'm mostly enjoying. A few months ago, however, he started sticking his free hand down my shirt, especially when he's nursing to sleep. At first I thought it was really sweet and cuddly, and my son kept his hand right in the middle, so it was totally comfortable. But little by little, his hand began wiggling more, and traveling over to my free breast, which he now demands on holding and squeezing while he nurses. And he's also really fond of pinching my nipple, which drives me crazy! It's this terrible tickle sensation that's really uncomfortable and distracting for me. But it becomes such a power struggle when I say no that I often just let my son keep his hand there--especially when I'm trying to get him to fall asleep quickly.
Anyone else experience this? I guess the broader issue is setting boundaries around your body when it comes to your little one. My son really seems to have no concept that my body is not his, which I guess is pretty normal developmentally. But sometimes I get so uncomfortable that I'm ready to wean him and have my body back!