Mariposa said:
1. When you were in your previous sexual relationship with a woman, were you sexually exclusive with her? Did the two of you have an agreement?
I've been in two long-term relationships with women (one marriage, one engagement). In both cases, we discussed prior to our relationship my existing relationships with the boys. In both cases, I was given assurances that it was "no problem" as there was no sense of cheating or jealousy that could arise for the woman in question. In both cases, after time passed, that exact sort of jealousy arose and came to have genuine destructive power. In both cases, I was eventually given a "promise you will change and not be with them, or I can't stay with you" kind of ultimatum.
One phrase I'll never forget, during the melt-down phase of my marriage: "it is clear that you've found the love of your life: it's him, and not me, and I can't live with seeing that every day." I had no idea how to respond to that - because basically, it was true - but it was true before I'd met the woman in question, so I wasn't sure how I'd done wrong. I'm still not sure what I did wrong.
I'm not currently mixed-up with any two-legged partners, so the answer I provided each of them after the put forth the "it's either them, or me" question is fairly obvious: don't let the door hit you on the way out, honey.

Actually, with the second one it didn't get that far - I could feel things headed right down that path, and cut it off before it got that bad.
I never cheated on either woman, with a two-legger. Interestingly, both later expressed "well of course" feelings about whether they'd feel slighted if I was with a female critter at some point. This seemed utterly mysterious to me, and I suppose it still does. Both were deeply jealous, right off the bat, of any sort of (purely Platonic) friendships I'd develop with mares or bitches. So jealous that it almost seemed like parody - but wasn't.
2. Do you think in the future you may have either an exclusive male or female partner (or both - like a triad)?
Are we talking two- or four-legged? That might sound like an odd question, but I wanted to be sure I understand before I answer.
With regards to the original topic (sorta), I am deeply confident that zooish proclivities have a significant genetic component - as much or more so as is found in the gay/straight determinism. There's exactly zero solid research on that question, so that hunch is based on my own 20+ years of experience in meeting and getting to know other zoos, around the world. Interestingly, it very much runs in families - you can see it come down from generation to generation, in some cases, clear as day. I have a theory on where the evolutionary basis of this proclivity may have roots, in humanity, but my theoretical framework needs much more research and refining before it's ready for public consumption.
Peace,
Fausty