i don't have any kids but i'm around them a lot. my niece is coming up on 4 yrs. in a few days and she's the one i'm around the most. i've always made it a point to tell her about inappropriate touching and why it's not ok. i also talk to her about why it's not ok to talk to strangers, wander off by herself, etc. i mean, we hear about kidnapping, molestation and pedophilia so much these days. i don't want her growing up thinking that it's normal, even if she's not completely competent enough to understand what i mean yet. i make it a point for her to know that if someone--an adult, classmate, a stranger, just anyone in general--were to touch her private area, it's inappropriate and she needs to tell me, or her parents, or a teacher, or our family members about what happened. i personally believe you can never start too early and you can never be too safe, especially when it comes to the little ones.