Piers Morgan has issues, clearly. We kiss my 3yo son on the lip and it would be weird at this point not to. We have noticed him getting some snickers by little girls (the boys don’t care for whatever reason) when they see this at preschool drop-off, so we encourage cheek kisses for that. But really I don’t see how it’s anyone’s business. Everyone comments on the fact that my son clearly feels well-loved and confident because of it.