Quote Originally Posted by GoktimusPrime View Post
Transformer genders exist for the same reason why most robot modes look humanoid -- to help the human audience relate to them as characters.
People tend to forget this and get caught up in the whole idea that Transformers is this whole real thing, devoid of the pressures of appealing to the public and selling toys.

Yup, there are female Transformers and bipedal Transformers because they appeal to toy buyers. If Transformers existed simply as fiction devoid of market pressures, then there would be no reason every TF couldn't look like they were out of the Movieverse or something, with 4 legs and 3 arms and their head in their chests and one big eye with no discernible gender and speaking in binary. But toys like that might freak 5 year-olds out rather than enticing them to buy, and would make animation for tv cartoon shows a nightmare.