Everytime we meet up with other children either friends or family it almost always ends up with an awkward kissing stand off between my 3 and 4 year old and the other child.
I've never made them kiss or hug anyone, I just encourage them to say or wave goodbye then if they want to kiss or hug it's up to them.
However there have been many 'jokey' comments about them rejecting or not loving the other child. I get the impression people think they are rude and I should be doing more to encourage them.
I don't want them to come across as rude but nor do I want them to think they have to kiss or hug if they don't want to.