The only reason you think religion is "too obsessed with sex and sexuality with regard to clothing" is because you've either been so desensitized by living in such a society that you apply the same thought to everyone else or you're in denial about the innate traits of a human being. Your society which is based on secularism is ok with having nudie bars, prostitution, etc and somehow you feel it is right to say that religion is obsessed with sexuality?
Or maybe there is just another way of thinking about modesty than your way? Personally, I think there's room for both. I don't wish to impose my idea of modesty on you but nor do I wish your idea of modesty to be imposed on me.