I don't believe that any woman, truly deep down, would be happy knowing that her DH would like to shag men.
What I do believe, is that (younger) women these days, are so conditioned to be "cool", and accepting (even if it goes against their core values), that they will, at their own expense, twist themselves into any shape, to fit around the current trend. Because if they don't, they could be called Bi-phobic, bigoted, homophobic etc. We are constantly being conditioned by men, to put our own needs last. We have seen it in these posts here.
The Op, a case in point, not wanting to push her DH, lest she impacts his mental health. HIS mental health? He wasn't thinking too much about her well being, when he married her under false pretences. He's not thinking about how she feels, now that he has sat her down to reveal his bomb shell. It's all about him. And the Op can't see it. It's all softly softly, instead of saying how she really feels, which is truly blindsided.
I also wonder, why this revelation now? 100% he wants to act on it, otherwise why upset the apple cart?
I'm 54, and I couldn't give two shits what people think about me. Call me all the names you want, I don't care, and there's no way that I want a man in my bed that shags other men. It's a turn off for me. Those men can do what they want in life (of course), but they're just not in my dating pool. Neither are skinny men, short men, aggressive men, men who kill animals, men who won't travel, men who don't work, men who have small kids.......and so on and so on. My vagina, my choice.