Muffled
Jesus in me
So Asimov wrote the Bible?
I believe your conclusion does not follow from the premises.
Here is my logic:
The law can be generalized to that of function. ie As Paul put it trading the natural for the unnatural.
THe function with a female robot (by a man) is tha same as the function with a female.
The function with a male robot would be just as unnatural as the function with a male.
One could argue that sex with a robot is unnatural but I believe the law is more about function than about nature.
One could argue that sex with the same gender is just masturbation since it can't perform the same function as sex with a woman.
However I believe it is the possibility of disease that drives the law on this although there is something to be said for not having perverted thinking. For instance it was perverted thiinking on Eve's part that she should know as much as God or that knowing evil would be a good thing.