Ignoring intersex, how come there has to be two males and a female at one of the ends to make it a bisexual sandwich? Why isn't the tag used for any bisexuality displayed? Take for example a female in the middle using a strap-on on another female.

I can see how if the the ends of the sandwich are bisexual towards each other it wouldn't count and would be tagged sandwich position and bisexual separately.

Honestly I didn't realize until now that apparently the tag doesn't apply to f/f m/f bisexual sandwich scenarios. Honestly, I feel it should, considering how the bisexual tag works here

Wiki should be edited accordingly to reflect this if no one disagrees that it also defines this type of scenario