I'm preg with DC2 due in a couple of months but DS (2 and 1/2) is an obsessive nipple tweaker (despite not being breastfed for 18months).
He understands that there's a baby in Mummy's tummy but don't think he gets that he's not going to have exclusive access to my boobies any more 
Would love to explain it more - can anyone help?
TIA