seeking: bisexual men

Are you a bisexual man? Do you know any? If so, I would be much obliged if you could direct them to this post. I have urgent need of bisexual men. It's not even for dirty questions this time!

What I want to know is: do bisexual men see any differences between their relationships with women and their relationships with men? If so, what are those differences? Is the tenor any different? Is their role in the relationship different, or is there any sort of mental shift between genders? Are there things you can do in a relationship with a man that you can't do in a relationship with a woman, or vice versa? Is there anything different in your expectations from one to the other?

Any other thoughts on relationships from bisexual men would be greatly appreciated. I'm not just asking for purient interest, I'm actually writing bisexual characters and I want to get some advice from people on the ground running, if you see what I mean.

Thanks a lot!