Thank you for all replies, and thanks for being understanding. To me, it just very different culturally, that explains my strange feelings to it. Hope I make sense.

Our marriage is fine, husband is Not a kinky guy.
We only have the 'vanilla' sex, the traditional normal sex between a man and a woman, Nothing out of ordinary sex.... It just him give a kiss on my butt cheek is kindda weird to me.

I guess it time for me to adapt to his 'loving' style. We do have a huge cultural difference though. But he is an awesome husband, I have no regrets married to him.