Sure, but I do not know what these percentages are. Come to think of it, I'd actually be interested in such a survey!

But let's say, for the sake of argument, that half of gay people switch and half don't.

In yaoi, over 90 percent do not switch.

So yes, I can see how those who do switch would be somewhat annoyed.

On the other hand, I can also understand that a writer does have (fetishistic) preference for a certain dynamic in that couple...