>>150160382
Transformers is one of the few popular and long-running sentient robot shows/franchises, and most of the characters are male, so a lot of straight female and gay male robot fetishists end up concentrated in one fanbase. (Judging from the art I've seen on this board, straight male robot fetishists go to My Life as a Teenage Robot instead.) From there, it's probably the same reason why the same thing, but with straight male fans, happens to every cartoon with at least one cute girl.