I am probably too old for you to be interested in my opinion as I'm now 61 and have been married for 25 years .
However in case you are interested, in my 30s I did date a bisexual man. It was not a long relationship ( about 6 months) but whilst I found didn't care at all about the fact that he had slept with men in the past in terms of jealousy or any sort of ' disgust' it was in the mid 90s so HIV was a concern, though thay was easenough h to deal with as we had tests, used protection and agreed to be monogamous etc. In fact one of the best things about that relationship was the need for us to really communicate as he was honest up front about his sexuality. This meant I was forced to think about what I wanted and to communicate with him in a way I might not have, when roles are more normative and things are sort of expected and understood
I did start to worry though that he would not be able to give up sleeping with men for good. We also had different expectations, I had been married and divorceed by then and was looking for monogamy he was willing to do that as well but it became clear that in the long term he was hoping I would agree to something more open just wit regards to sex, he was always clear that ours would be the primary relationship and he was not looking for any other emotional intimacy, but and that was just not me, it still is not.
In the end we split up more because he could not really see himself in a long term monogamous relationship and I had started to worry that he would be unable to give up sex with men, effectively forever. That was just that specific relationship, maybe with someone else It would.have worked . So in effect I.woild have had no problem with a bisexuality man but my needs and desires are pretty heteronormative and so the man I choose to be with, needs to want the same things enough to give up sex with anyone else, not just intimacy.
I suppose.l my insecurities would make me wonder whether I would be enough for him to resist the temptation for sexual adventures after a long marriage . I know from experience how hard it is to be sexually faithful in a long marriage when you really are only interested in one sex, let alone when you are attracted to two.
For a fling or non serious relationship, I would have no problem with it at all though.