I'd consider myself bi, though haven't done much with a guy, and that was a loooong time ago. I often think about doing something with a man, and a few of my fantasies involve me with a guy. However, I rarely used to use those when I was actually masturbating. It was kind of like the bit that got me in the mood, and then I used more hetero images to finish off. However again... Recently I have been masturbating and using bi or homosexual images while masturbating, like being sucked by or sucking another guy, masturbating him, or even fucking each other. But as I've got older I've found myself becoming much more open about all sorts of things so I guess it's a symptom of that.