I am debating on going exclusive! Because too be fair I love having sex with men also. But I do feel like the sex with the dog is just amazing and as you said yourself satisfying. I'm not saying sex with men isnt satisfying but with the dog it's just 110% better. I love it. And yeah I'm same I want to do it frequently. But still debating on going exclusive.
If you love having sex with both, why go exclusive, just enjoy both?
I think this will depends on the guy. Maybe he's just into watching and not into the sex activities part, either with the dog, or you. Or your relationship is open and he is able to have sex with someone else, maybe while watching you. Me, personally, I'd love to watch my partner have sex with one, but I wouldn't want to be replaced either. I want to have my fun with her too. I want to share the experience together and grow closer together as a couple for sharing something special. If she turns me on, am I just supposed to just jerk off on my own again? I can be single and watch porn for that (do that now).
Was married twice and had to do that being told "no" all the time when I wanted sex. As far as I know, they just didn't want sex as much as me (or at all once the ring hit ex #1's finger after it was daily before that, literally would mark the weeks on the calendar then and see if it made a new record). Now I'd be replaced by a dog getting it nightly and all I can do is watch from now on? At least with videos, the subject of my desire I know isn't accessible, but if it's right in front of me and I can't touch because she's exclusive to it, then I'm not in a relationship, she's just a friend putting on a show. Too many nights I've had to roll over with hardons because an ex said "no," even after teasing me all day saying we'd have it that night. Not sure I could handle being told "no," while the dog gets "yes" every time.
But that's me. Maybe some don't want to have sex with their woman in a relationship, like women often don't want when married (not always true, but so far for me, it kinda fits the old joke: "What cake ruins a woman's sex drive? Wedding cake." lol).
I used to talk to a woman into this and in an open relationship who had sex with whoever she wanted. I asked if this caused any friction in her marriage. She said no, she didn't neglect her husband, he got a blow job every morning and they still had sex regularly. He had no reason to feel neglected when she slept with other men and the dog, he was still getting it when they both wanted it.