Giving/having a kiss (whether on the cheeks or lips) in pubic has always been fine with me, even in the Philippines. Just as long as it's not torrid kissing like the ones you see on TV/movies. A kiss and a hug are signs of affection you should not be ashamed of in my view. My parents do kiss in front of us (kids & other relatives) even now, and even a friend told me recently that she finds my parents very cute when they're showing their affection and sweetness towards each other.
so where did this cultural thing come from ?Is it taught in schools that kissing in public is frowned upon ? surely its a sign of affection to most human beings ,I can,t understand why philippinas are so shy when it comes to kissing.