See that explains more properly how it could come to be a term for transexuals..hence a lid having a hole where a straw goes as the main purpose of it's exsistence.. I don;t think I could be called wrong at this point watching as much actual japanese television, and actually communicating with japanese people to further my knowledge at one point, but whatevs.
Sexual shit is taboo from business japanese which is what is commonly taught and provided to outsiders as lessons. That's why I brought it up. I almost feel there is a more suitable word to count tits and shit with, but having no knowledge in that area sets me at a disadvantage there. I don't care enough atm to get into it so I'm going to accept that when I count sexual items the word futa is appropriate.. *shrugs*