I realise it's (probably) totally normal, but all I can hear in my head is my mother's voice saying 'don't touch'! Instead I try to respond just by saying 'yes, that's your XX' (I mean I don't call it her XX, I just don't want to get diverted by that thread), same as I would say 'yes that's your tummy button/nose/toes' etc. But actually I feel a bit embarrassed and would like to know what other mums have said. BTW it definitely looks like she's enjoying it, but I don't feel quite OK saying 'go for it!'.