My son has very strong feelings towards me kissing his mother. Basically I'm not allowed... I have to sneak one in when he's not looking or he starts shouting STOP! And starts hitting. It's hilarious!
I think this is some karma coming back to me as I also had a problem with my parents kissing or cuddling a little too close. Not sure where it comes from, but I'm interested to know if any of your kids do the same? I've tried explaining a little about how he came into this world but that might be a little early.