Seems you would know.
Yes, once I saw some pictures of a hot "woman", and I thought "I'd hit that" only soon after to find out that the "woman" was a transsexual.
Another time I saw a video of a guy fucking a chick in the ass and at the end of the video the "chick" opens her legs to reveal "her" cock.
A third time I saw a video of a transvestite "woman" having sex with a real woman.
These were internet prank videos and I did feel somewhat confused for several seconds after the true nature of these videos became apparent.
BayGBM might feel the same way seeing a "back double bi" shot of a muscular female?