What if there was some kind of accessory (a hankie or pin or something) that let people know that they would be interested in being raped? Since it’s a small accessory, it would be relatively inconspicuous to those who aren’t looking for it and would be easy for the autobiastophile to add or remove depending on whether they’re feeling it. (Yes, this is inspired by the hanky codes used in old gay communities.)
My proposition is that these accessories would have some kind of emblem on them. A pink elephant, perhaps, since “pink elephants” is something of a stereotypical safeword in BDSM communities.
I dunno, again, kind of a silly idea, and there’s definitely some issues that would need to be worked out.
I think a code word/phrase or something should come with it. For instance, you see someone with the code symbol, but to be sure this isn’t a coincidence, you could say “I have a friend with that (pin/scarf/etc).” Or something… My idea, since I want it to be easy for anyone to acquire/make; (A pink scrap fabric or scarf with a purposeful black blotch on a corner (would have to have the blotch visible) (a black and pink pin, or similar, with an elephant, or a symbol I might design specifically for this). Other codes, possibly… (“Did you make that yourself?” answering yes actually means the person meant to have the item out/on them, answering no means they meant to put the item away or forgot they had it out, and it should be ignored. Saying a friend made it is code for the person to respond with a joke about the friend, because the person is trying to make sure you are aware of and purposefully using the code) (“It matches your outfit/vibe/look/makeup” is code for “Oh hey, I know the code! I won’t be doing anything to you, but I did notice.”)