There’s a huge spectrum in sexual expression among all human beings, and because it’s very private it can be hard to you’re bearings on reasonable, but I would say that’s ~2.5% of the population with ~2.5% being team “none unless it’s reproductive.” It’s the kind of shit where you can pick apart the methodology of any study like a Costco chicken because of how complex peoples reactions to their own sexualities can be.

If an “Ashley Maddison” tier thing happened with Grindr… I think about 1/10 straight married men actively have sex with men on the side, with varying justifications/outright denial of the thought of being “bisexual.” Sex is a powerful, irrational drive that can override ethics and self identity - which makes it difficult to study.