There are times not to flirt. When you're sick. When you're with children. When you're on the witness stand.
I believe that all of us are born heterosexual, physically created with a plumbing that's heterosexual, and created with the instincts and desires that are basically, fundamentally, heterosexual.
Right after 9/11 there was a magazine with a cover of kids, mostly 12-14 year-olds, who were being trained for military combat. I thought that this had just gone too far.