Why are straight men willing to have sex with men if their feminine enough?

For example, F1nnister identifies as a 100% straight male. He is not attracted to men and started cosplaying as a girl for jokes before continuing it because it was bringing him money in on streams.

Now, F1nnister is in a relationship with a transgender woman (see person in video caption). How is it that straight men are able to bring themselves to smashing out biological males if said male becomes passable enough?

In a related story, this guy rejected a man who had the hots for him. The guy decided to transition and later ended up in a relationship with him.

Why are straight men willing to have sex with men if their feminine enough?

So again these situations are not isolated.

Why are straight men willing to have sex with men if their feminine enough?
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