Most of my stories are about straight men who are usually forced into a situation where they are required to service other men sexually. When this happens they are surprised to find out that they are turned on by the sex and that they also discover that they have a bit of a submissive side as well, yet they still consider themselves heterosexual men.
Another common theme of my stories is where an older male sexually corrupts a younger male either through the younger males ignorance or through intimidation or force.