DS is constantly puckering up. It's lovely, don't get me wrong, but sometimes I worry (as you do).
When we get up he pulls me down onto the giant bean bag in the sitting room and has a snog (it's a residue from breastfeeding and he basically sucks on my bottom lip), everytime he's uspet he wants a suck, when I put his socks on he steals a kiss, he can dive on me at any moment basically. I wish his dad were so ardent!