You're justifying your bias against homosexual men by blaming human psychology.
Your experience is not universal.
I'm not virtue-signaling when I say that I've never had any type of physical or psychological response to a homosexual couple. I was raised in the Deep South of the U.S. and many members of my family are anti-LGBT, but that's a cultural stance, not a natural stance.
I suggest looking into actual scientific studies and getting a broader range of data points.