Last week, a neighbour kissed my baby on his lips. I was so surprised, I didn't even respond. I think it's unhygienic and disgusting. Am I overreacting? How can I be polite, but make sure this doesn't happen again?

Agreed with everyone here - not over reacting for sure. In fact, I always insist whoever wishes to touch or hold our baby would have to wash their hands first or at least the hand sanitizer! We didn’t care if our friends or close family members. Always be safe than sorry :)