Since this is in the religious forums, I'll respond from that angle.
Spirituality is, by nature, the softer side of the human psyche. What we consider to be feminine is the softer side of humanity. So, religious threads will tend to be 'girly' more than 'manly'.
Suggesting we can discuss saving the world and innocent animals through a religious discussion is (from my way of thinking) a 'girly idea'. But, I couldn't even begin to imagine an interesting 'manly' thread in the religion and philosophy section.