As a mostly straight dude who does not score high on conventional physical attractiveness I encourage absolutely everyone independent of their gender to hit on me. Being told/signaled that I am attractive is always welcome.

Just don’t blatantly ignore boundaries like physical touch without explicit consent. That too applies completely independent of gender.

TL;DR: The USB Implementers Forum is ridiculously bad at naming, symbols and communication in general. (And they don’t seriously enforce any of this anyway, so don’t even bother learning it.)