This is something I don't feel comfortable with lately. We have 4 under 6 and I feel strongly about protecting their own choices. If they don't want to kiss goodbye that's fine with me especially to extended family.
So my mums partner and my mother in laws partner always copy my mum and mother in law (if that makes sense) and will just go along with the "kisses goodbye" kind of thing but it's not something I feel good about.
It's only a recent thing really but not sure how I can mention without offending my actual family.
Of course if I ever thought anything was wrong I would stand up for my children but there's nothing seedy about it, I just personally don't think it's needed. They are kind to our kids, and have been about since birth but it's just not necessary to peck goodbye. Maybe the kids see it as normal as us adults do it?
If at any point they say no, or ignore then I never make them do it. But I just wondered how to avoid it in any case.