Curious of his body parts

Tianna • I'm just a mom

My son will be 2 soon (as i keep bringing that up) but for sometime now He has seemed to be very aware and curious of his body parts and others as well. When he is being changed or if im just letting his little bum get some fresh air around the house he tends to poke at his chest area, belly button and of course his other boy parts. Should we talk to our children this young about those body parts. I just get concerned because when i am getting dressed he tries to go after my boobs and i say no touch but he doesn't understand why i say no. Im just concerned of this saftey wise so he knows to keep his hands to himself and that other ppl shouldn't touch him either. Ive been a victim as a child and it really messed me up because at the time i did not understand.