I can't comment on kid's smells but scientific research suggests that love happens through the nose. We are attracted to someone's body odour.
http://www.thebostonchannel.com/heal...47/detail.html
Also, I've always found it interesting that the Swiss have a saying: I cha di nüd schmecke (I can' stand the smell of you).
On the other hand, my father-in-law ate a lot of garlic which you could smell in his body odour. I didn't like to be too close to him but I still enjoyed his company.