I'm Gay, and I totally have no problem to see heterosexual contents, as long as it's not forced, heck I might even enjoy those if the males are hot. I admire good art, also admire beautiful woman - just not in a sexual way.
Some people are just too close minded that they can't understand / accept anything different, it has nothing to do with Hetero / Homo / Bi / Asexual, it's their problem.
And for anyone doesn't bother to read the OG post:
"The M/M or F/M content is completely optional, you can choose what you like best when you get to a location with a character. "